characteristic: The main body is made of aluminum alloy, which has anti-corrosion and anti-rust functions and long service life. In the process of measurement, firmly lock the drawing line of the angle, and move and rotate the ruler to get any angle. Suitable for students, machinery, carpentry, vehicle maintenance, construction and drafting. Can be used in workshops, home improvement, tool boxes and cabinets. describe: Name: Woodworking limiter Set Material: Aluminum alloy colour: Black+red Package Contents: 1 x Woodworking limiter set Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.