characteristic: This is a multifunctional combination square, which can meet your various needs with only one ruler. The square ruler of protractor is made of high quality stainless steel, which is rust-proof, and . The measuring range is 0-180 degrees, and the accuracy is 5 feet /0.08 degrees. This woodworking workshop adopts bevel edge blade, roller knob and fine adjustment. Each mark is laser carved, so it is a laser carved scale. Suitable for measuring internal and external angles of parts. The length of ruler is 300mm. Technical features: The Numbers: 3 Material: Stainless steel colour: As shown Package Contents: 1 x combination square 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.