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. You 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 19mm bench clamp is suitable for woodworking tables with stable and secure clamping. It is versatile and can be used with various angle rulers. 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. 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 variety of angle rulers., Weight: 0.22707612986 pounds, Manufacturer: NONDK