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Combination Squares

top picks

What’s in the Toolbox

tool

features

options

STANLEY 300mm (12”) Combination Square Silver and Black with Metal Handle (2-46-222)

  • 3 machined faces for accuracy
  • Scriber fitting for accuracy and convenience
  • With metal handle

Option 1
1 PACK
(1) 300mm (12”) Combination Square Silver and Black with Metal Handle (2-46-222)

See Pricing

STANLEY 300mm (12”) Combination Square Die Cast (2-46-028)

  • Precision die cast body with 3 precision machined faces for accuracy
  • 360° vial for all round visibility
  • High quality brass nut and scriber fittings for long life
  • High visibility reading etched and coated blade for rust resistance
  • Metric / imperial graduations

Option 1
1 PACK
(1) 300mm (12”) Combination Square Die Cast, (2-46-028)

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IRWIN Combination Square Stainless Steel with 45 and 90 Degree Marking, Various Options

  • Black precision-etched scales
  • Durable cast zinc body
  • Rust proof stainless steel blade.
  • Perfect for 90° and 45° marking
  • Can be used as a gauge for transferring measurements

Option 1
1 PACK
(1) 150mm (6”) Combination Square Stainless Steel with 45 and 90 Degree Marking (1794468)

Option 2
1 PACK
(1) 300mm (12”) Combination Square Stainless Steel with 45 and 90 Degree Marking (1794469)

Option 3
1 PACK
(1) 400mm (16”) Combination Square Stainless Steel with 45 and 90 Degree Marking (1794471)

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STARRETT 300mm (12″) Combination Square Steel with Spirit Level (11H-12-4R)

  • The ruler has a 4R graduation type with 8ths, 16ths, quick reading 32nds and 64ths that greatly increase the accuracy of your measurements
  • Able to withstand even the harshest environments as our combination squares are designed to last a lifetime
  • The square head can be used for a variety of purposes such as scribing right angles and parallel lines, measuring, tri-squaring, mitering, depth gauging, height gauging and levelling
  • The blade is made of hardened steel, offering exceptional durability and resistance to wear, rough usage, high-impact pressure and shock

Option 1
1 PACK
(1) 300mm (12″) Combination Square Steel with Square Head Blade, Cast Iron Heads, Reversible Lock Bolt, Spirit Level and 4R Graduation Type (11H-12-4R)

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STARRETT 300mm (12″) Combination Square Set with Square, Center and Blade (C11HC-12-4R)

  • The square head can be moved up and down on the rule with a lockable assembly and a specially designed bolt to engage the slot for stability and versatility while measuring
  • The center head is an available attachment that provides an easy means of accurately locating the center of cylindrical or square work
  • The ruler has a 4R graduation type with 8ths, 16ths, quick reading 32nds, and 64ths that greatly increase the accuracy of your measurements
  • The blade is made of hardened steel, offering exceptional durability and resistance to wear, rough usage, high-impact pressure and shock
  • Able to withstand even the harshest environments as our combination squares are designed to last a lifetime

Option 1
1 PACK
(1) 300mm (12″) Combination Square Set with Square, Center, Blade and 4R Graduation Type (C11HC-12-4R)

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STARRETT 300mm (12″) Combination Square Set with Square, Center, Non-Reversible Protractor Head and Blade (9-12-4R)

  • The square head can be moved up and down on the rule with a lockable assembly and a specially designed bolt to engage the slot for stability and versatility while measuring
  • The Center Head is an available attachment that provides an easy means of accurately locating the center of cylindrical or square work
  • The protractor head has revolving turrets with direct-reading double graduations, a full 0 to 180° range in opposite directions which permits accurate and quick direct reading of angles above or below the blade
  • The set includes the rule, square, protractor and center heads that are made from durable hardened steel

Option 1
1 PACK
(1) 300mm (12″) Combination Square Set with Square, Center, Non-Reversible Protractor Head, Blade and 4R Graduation Type (9-12-4R)

See Pricing

STARRETT Square Head with Hardened Steel Center Head (H33-1224)

  • The square head can be moved up and down on the rule with a lockable assembly and a specially designed bolt to engage the slot for stability and versatility while measuring

Option 1
1 PACK
(1) Square Head with Hardened Steel Center Head (H33-1224)

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STARRETT Center Head Cast Iron Steel (C11-1224)

  • The center head is an available attachment that provides an easy means of accurately locating the center of cylindrical or square work
  • Made from cast iron steel that is resistant to abrasion and indentation. It can absorb a lot of energy without breaking, making it a tough and resilient product for everyday use

Option 1
1 PACK
(1) Center Head Cast Iron Steel (C11-1224)

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STARRETT Non-Reversible Protractor Head Cast Iron Steel (CPNR-1224W)

  • Non-reversible protractor head for combination squares, combination sets and bevel protractors
  • Direct-reading double graduations of 0 to 180 Degrees in opposite directions, for accurate reading of angles above or below the blade
  • Made of cast iron with a black wrinkle finish and with chrome on the turret

Option 1
1 PACK
(1) Non-Reversible Protractor Head Cast Iron Steel (CPNR-1224W)

See Pricing

a Tool for Every Job

Combination squares are versatile tools that hold a significant place in the toolbox of tradespeople across various industries including carpentry, metalworking, and stonemasonry. These tools consist of a ruler with one or more interchangeable heads that can be adjusted along the ruler’s length allowing for a range of measurements and marking functions. The most common heads are the standard square head, the protractor head and the center finder head. This flexibility makes combination squares an essential instrument for professionals who need to perform multiple types of measurements and markings with precision and efficiency.

It enables accurate marking and measuring of angles which is crucial for cutting and fitting wood pieces together seamlessly. The square head helps in marking and verifying 90-degree and 45-degree angles essential for creating square corners and miters in construction projects. The tool’s ability to measure depth and transfer measurements also aids in tasks such as setting depths for saw blades or router bits. The versatility and precision of the combination square allow carpenters to achieve a high level of craftsmanship in their work.

In metalwork, combination squares assist in laying out accurate measurements on metal pieces which is critical for fabricating parts that fit together precisely. The protractor head allows for the measurement and marking of a wide range of angles facilitating complex cuts and joints that are often required in metal fabrication. The center finder head is particularly useful for finding the centers of cylindrical objects aiding in tasks such as drilling and lathe work. The robustness and precision of the combination square make it a trusted tool for metalworkers aiming to produce high quality components.

In masonry work, combination squares help in marking and cutting stone with accuracy ensuring that each piece fits perfectly into the overall design. The adjustable nature of the combination square allows stonemasons to transfer measurements from plans to the stone facilitating the accurate execution of intricate designs. The tool’s ability to measure both straight and angled cuts makes it versatile enough to handle the diverse needs of stonemasonry from rough initial cuts to precise finishing touches.

Their multifunctional design enables tradespeople to perform a variety of tasks with a single tool enhancing efficiency and accuracy in their work. Whether in wood, metal, or stone the combination square stands as it demonstrates to the importance of reliable measurement tools in achieving professional level craftsmanship.

BUYERS GUIDE

Combination Squares

Material and Construction:

When purchasing a combination square the material and construction quality are paramount. High quality combination squares are typically made from durable materials such as hardened steel, stainless steel or cast iron. These materials ensure the tool’s longevity and resistance to wear and tear. Look for a square with a robust well machined ruler and heads that fit snugly without wobbling. The ruler should be clearly marked with engraved or etched graduations that are easy to read and resistant to fading. A sturdy well constructed combination square will provide accurate measurements and withstand heavy use over time.

Accuracy and Precision:

Accuracy is a critical factor when choosing a combination square. Ensure that the tool meets industry standards for precision which guarantees that the 90-degree and 45-degree angles are exact. Some high end models come with a certificate of accuracy which can provide added assurance of the tool’s precision. Accurate measurements are essential for achieving high quality results in any trade whether it be carpentry, metalworking or stonemasonry. Investing in a combination square known for its accuracy will help avoid costly errors and rework.

Size and Versatility:

Combination squares come in various sizes typically ranging from 150mm (6”) to 300mm (12”) or more. The size you choose should depend on the nature of your work. Smaller squares are ideal for fine detailed tasks while larger squares are better suited for larger projects. Consider purchasing a set that includes multiple sizes to cover a wider range of applications. The versatility of the combination square with its interchangeable heads such as the standard square head, protractor head and center finder head makes it a multifunctional tool that can handle diverse measurement tasks.

Ease of Use:

A good combination square should be easy to use and adjust. Look for a tool with smooth easy to operate adjustment mechanisms that allow the heads to slide and lock into place securely. The heads should move freely along the ruler without binding and the locking mechanism should hold the heads firmly in position during use. The tool should be comfortable to hold and use with ergonomic features that reduce hand fatigue during extended periods of work. Ease of use enhances productivity and accuracy making your tasks more efficient and enjoyable.

Price and Value for Money:

While it’s important to stick to your budget remember that quality often comes at a higher price. Cheaper combination squares might save you money upfront but they can cost more in the long run due to their lack of precision and durability. Consider the long term value of the tool. A more expensive high quality square will likely provide better accuracy, last longer and contribute to the overall quality of your work making it a worthwhile investment. Weigh the initial cost against the potential benefits and longevity of the tool to make a balanced decision.

Calibration and Maintenance:

Some combination squares come pre-calibrated while others might require initial calibration before use. It’s important to choose a tool that either comes with a certificate of calibration or can be easily calibrated using standard methods. Regular maintenance such as cleaning and proper storage is essential to keep the tool in good working condition. Ensure that the combination square you choose can be maintained easily and consider whether the manufacturer provides support or services for recalibration if needed.

Additional Features:

Some combination squares offer additional features that can enhance their functionality. Look for models with engraved or laser-etched scales for improved durability and readability. Some squares also include spirit levels which can be useful for leveling and plumb measurements. Additional features like a scribing tool or a built in level can add value and versatility to the combination square making it more useful for a variety of tasks.

UNVEILING THE pros AND conS

Combination Squares

pros

  • Combination squares are designed to perform multiple functions such as measuring and marking right angles (90 degrees), 45-degree angles and various other angles with the protractor head. This multifunctionality makes them required in a variety of trades including carpentry, metalworking and stonemasonry. With interchangeable heads like the center finder they can also be used to locate the center of cylindrical objects enhancing their range of applications.
  • Combination squares are known for their precision and accuracy. High quality models are manufactured to strict standards ensuring that the angles and measurements they provide are exact. This accuracy is crucial for tasks that require precise measurements and markings such as cutting wood, metal or stone to exact dimensions. The precise graduations on the ruler, often etched or engraved further enhance their reliability making them a go to tool for professionals who demand accuracy in their work.
  • Combination squares are relatively easy to use even for those who may not have advanced technical skills. The heads can be quickly adjusted along the ruler to the desired position and locked in place securely. This ease of adjustment makes it simple to switch between different functions and measurements saving time and improving efficiency.
  • Made from robust materials such as hardened steel, stainless steel or cast iron combination squares are built to withstand heavy use and harsh working conditions. This durability ensures that they maintain their accuracy and functionality over time making them a cost effective investment. Proper maintenance such as regular cleaning and calibration can further extend their lifespan ensuring they remain reliable tools in any tradesperson’s toolbox.
  • Combination squares are generally compact and easy to carry making them convenient for use on various job sites. Their portability allows tradespeople to have a reliable measuring tool on hand at all times which is especially useful for tasks that require frequent movement between different locations. This feature enhances their practicality and ensures that accurate measurements are always within reach.

cons

  • High quality combination squares can be expensive especially those made from premium materials and with precise manufacturing standards. While they are a worthwhile investment for professionals the initial cost may be a barrier for hobbyists or those on a tight budget. Cheaper models may lack the same level of precision and durability leading to potential inaccuracies and a shorter lifespan.
  • While combination squares are generally easy to use there can be a learning curve for beginners who are unfamiliar with their various functions. Understanding how to properly adjust and use the different heads as well as how to read the measurements accurately can take some practice. This learning curve might be a drawback for those who need immediate precision without prior experience.
  • Despite their durability combination squares can still be susceptible to wear and damage especially if they are dropped or mishandled. Any deformation of the ruler or heads can compromise their accuracy making them less effective. Regular calibration and careful handling are necessary to maintain their precision which can be seen as an additional maintenance burden.
  • While combination squares are versatile they are primarily designed for measuring and marking specific angles such as 90 degrees and 45 degrees. For tasks that require other angles or more complex measurements additional tools may be needed. This limitation means that combination squares cannot entirely replace other specialized measuring instruments in a tradesperson’s toolbox.
  • Some combination squares particularly those made from cast iron can be relatively heavy. This weight might be cumbersome during extended use or when performing delicate tasks. While the heft can add to their stability and durability it can also lead to user fatigue particularly if the tool needs to be used frequently throughout the day.