A push-pull ruler is a tape measure that can be wrapped together in a compact case. It is used to measure long, short and straight lengths. The body of the tape measure is the case. It is the hardened exterior that protects the intestines of the tape measure from gravel and dirt and ensures the proper functioning of the action.
is a woodworking tool used for marking and checking 90° angles on pieces of wood. Though woodworkers use many different types of square, the try square is considered one of the essential tools for woodworking.
Most often used in combination with a protractor, a sliding T-bevel lets you mark angles. It is also known as a bevel gauge. The sliding T-bevel is excellent for transferring those angles to other tools like the blade of your table saw.
Protractors find and draw angles. It is also a perfect companion to set the angle on a sliding T-bevel.