This 19mm bench clamp is suitable for woodworking tables with stable and secure clamping. It is versatile and can be used with angle rulers. When using a triangular ruler for angle marking, you can select the desired angle to clamp, secure, and mark with a pen. The square ruler is great for stair guides, and you can use 2 clamps to secure it and mark it with a pen. The ruler allows for marking lines at fixed distances. Simply choose the desired length to clamp, secure, and mark with a pen. It can also clamp table saws and other tools for stability and support. You will receive a package containing 2 bench clamps. If the distance between the bottoms is too short, the double heads can be interchanged and clamped upside down. Use 2 clamps for additional support and vertical alignment. This bench clamp is stable and firm when clamping. It is made of aluminum alloy material, which is universal for woodworking tables. It can be used with a of angle rulers. Wide Application: This bench clamp has a wide application. When the triangular ruler is used for angle marking, it can be used for clamping and fixing on the desired angle. Stable and Firm: The clamping of the workbench stopper auxiliary tool is stable and firm. It can clamp table saws and other tools to fix them and use them as a backer. Product Name: Bench Clamp Set Size: 19mm /0.75inch Measuring range: 0-7mm Colour:B: Black Material:Aluminum Alloy Package Contents: 1 set x dog hole clamp 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.