Combination Square

A combination square is a versatile measuring tool commonly used in woodworking, metalworking, and other trades. It consists of a ruler or blade, a head or stock, and a scriber or marking point. The head can be adjusted and locked at different angles to measure and mark angles, depths, and distances accurately.

Here are some key features and uses of a combination square:

1. Ruler or Blade: The ruler or blade is typically made of stainless steel and has markings in both metric and imperial units. It is used to measure lengths and distances.

2. Head or Stock: The head is usually made of cast iron or aluminum and has a built-in level bubble for checking horizontal and vertical alignments. It can be adjusted and locked at different angles, typically 45, 90, and 180 degrees.

3. Scriber or Marking Point: The scriber is a sharp metal point located at the end of the head. It is used to mark or scribe lines on the workpiece for accurate cutting or drilling.

Uses of a combination square include:

- Measuring and marking right angles: The 90-degree angle feature of the combination square is useful for checking and marking right angles during layout work.

- Measuring and marking angles: By adjusting the head to the desired angle, the combination square can be used to measure and mark angles other than 90 degrees.

- Checking and transferring measurements: The ruler or blade of the combination square can be used to measure distances and transfer those measurements to the workpiece.

- Checking and leveling surfaces: The built-in level bubble on the head allows for checking and leveling horizontal and vertical surfaces.

- Depth measurement: The combination square can be used to measure the depth of holes, recesses, or grooves by adjusting the head and using the ruler or blade.

Overall, a combination square is a versatile and essential tool for accurate measuring, marking, and layout work in various trades and crafts.