Fangrui Product Details Features: High Quality Material, Main Body Anodized Cnc Precision Machining, Rust Proof, Anti-, And Wear-! Fits Easy To Use: Simple Design Allows For Easy Installation And Adjustment, Making It Suitable For Both Beginners And Professionals. Compact And , Making It Portable And Convenient To Carry Around For On-site Use. Stair Gauges For Conventional Framing Square Stops Framing Tool Rafter Gauge Workbench Peg Brake Stops Clamp Carpenter Tips: The Product May Be Updated Constantly ,due To Different Batches, The Actual Product May Have Slight Differences Or Color Differences, Which Does Not Affect Use Colour:red Material:aluminum Alloy Size:19mm Package Contents: 2x Angle Ruler Auxiliary 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.