This is a 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, durable and durable.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.The measuring range is 0-180 degrees, and the accuracy is 5 feet /0.08 degrees.Name: Combined rulerRuler Size: 300X25X2mmColour:silver+blackMaterial:Stainless steelPackage Contents:1 x Combined rulerOnly 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.