Combination Square

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A combination square is a versatile measuring tool used in woodworking, metalworking, and other precision tasks. It typically consists of a ruler with a sliding adjustable square head that can be locked at different angles along the length of the ruler. The square head can be used as a 90-degree square for checking or marking right angles, or it can be positioned at other angles to measure and mark various angles accurately. The ruler often has markings in both imperial and metric units, providing flexibility for different measurement systems. Additionally, combination squares may have a level bubble for ensuring horizontal or vertical alignment.

1. Stainless steel
2. Die cast metal handle with solid
brass knobs
3. Blade thickness: 1.8MM
4. Metric and inch scales
5. Packed by blister card



  1. Measuring and Marking Right Angles: The square head of the combination square is commonly used to check or mark 90-degree angles, ensuring accurate right angles in woodworking, metalworking, and other precision tasks.
  2. Setting and Checking Angles: The adjustable square head allows users to set and check angles other than 90 degrees. This is particularly useful in tasks that require precision, such as setting angles for miter cuts in carpentry.
  3. Layout Work: Combination squares are valuable for laying out and marking patterns, cutting lines, and other measurements on various materials. Carpenters, metalworkers, and machinists use them to transfer dimensions from a plan or blueprint to the actual workpiece.
  4. Depth Gauge: The ruler component of the combination square often includes depth markings, allowing it to function as a depth gauge. This is useful for measuring the depth of holes, recesses, or other features in a workpiece.
  5. Leveling: Many combination squares have a built-in level bubble, making them handy for checking the levelness of surfaces or ensuring vertical alignment. This is especially useful in construction and carpentry.
  6. Scribing Lines: The sharp edge of the square head can be used for scribing lines on a workpiece, providing a precise guide for cutting or other operations.
  7. Checking Squareness: In addition to marking right angles, combination squares are used to check the squareness of corners or assemblies. This is important for ensuring that structures or components fit together properly.
  8. Tool Setup: Machinists and woodworkers use combination squares to set up and align various tools, such as table saws, jointers, and drill presses, to achieve accurate and consistent results.
  9. Quality Control: In manufacturing and fabrication, combination squares are often employed for quality control purposes, ensuring that components are made to the correct dimensions and angles.
  10. Versatile Measurement: The ruler on a combination square usually has both metric and imperial measurements, making it a versatile tool for users who work with different measurement systems.
SKU: AHS93745 Category:



Safety Precautions

  1. Mind the Sharp Edge:
    • The edges of the combination square, especially the sharp edge of the square head, can be sharp. Handle the tool with care, and be cautious to avoid accidental cuts or injuries.
  2. Secure Workpieces:
    • Ensure that the workpiece is securely clamped or held in place before making measurements or markings. This helps prevent the workpiece from moving unexpectedly, reducing the risk of injuries.
  3. Proper Body Position:
    • Position yourself in a stable and balanced stance when using the combination square. This provides better control and reduces the likelihood of accidents caused by loss of balance.
  4. Use the Right Tool for the Job:
    • Choose the appropriate size and type of combination square for the task at hand. Using the correct tool ensures accuracy and reduces the risk of damage to the tool or the workpiece.
  5. Avoid Excessive Force:
    • Use gentle and controlled force when making measurements or markings. Excessive force may damage the tool or result in inaccurate readings.
  6. Check for Wear and Damage:
    • Regularly inspect the combination square for signs of wear, damage, or misalignment. If any issues are identified, address them promptly or consider replacing the tool to maintain accuracy and safety.
  7. Protect the Ruler:
    • The ruler of the combination square can be sensitive to damage. Avoid dropping the tool, and store it in a protective case or pouch when not in use to prevent scratches or other damage.
  8. Secure Locking Mechanism:
    • Ensure that the locking mechanism of the square head is securely tightened when setting angles or measurements. A loose locking mechanism can lead to inaccurate readings and compromise safety.
  9. Keep the Tool Clean:
    • Clean the combination square regularly to remove dirt, debris, or other substances that may affect its accuracy. A clean tool performs better and reduces the risk of errors.
  10. Use Personal Protective Equipment (PPE):
    • Depending on the task, consider using personal protective equipment such as safety glasses or gloves to protect yourself from potential hazards.
  11. Follow Manufacturer’s Guidelines:
    • Adhere to the manufacturer’s instructions and guidelines for the specific combination square model you are using. This includes information on maintenance, calibration, and any specific safety recommendations.

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