1、MAIN PURPOSES: Framing square attachment, can be used for marking repeat angle, assisting the square to guide the circular saw in angle cutting. 2、ALUMINUM ALLOY: The tall stair gauge jig is made of excellent aluminum alloy, with anodized finish, corrosion resistance and oxidation resistance. 3、HEXAGONAL DESIGN: Adopts hexagonal plane design, more suitable for edges, completely perpendicular to the material, ensuring stable and accurate clamping. 4、WITH THUMB SCREW: This stair gauge is equipped with an oxidized steel thumb screw, easy to grip and tighten to any raft frame, non slip and durable. 5、APPLICABLE RANGE: Including 2pcs tall stair gauge jigs, suitable for right angle ruler auxiliary and clamping, widely used in woodworking projects.