Features: 1Premium Material: The high stair gauge is made of premium aluminum alloy with anodized surface, rust proof, stable and durable. 2Application: Stair gauge knob is very stable and accurate, used in woodworking square mark repeat angle, guide saw to do angle cutting. 3Non Slip: This stair gauge knob tool is designed to be non slip and durable, easy to grip and tighten any rafter. Small and easy to carry. 4Convenient And Practical: Stair stringer layout tool for your saw on the guide, used to guide the saw to make angular cuts. 5Professional: Gives you an accurate framing jig and very precise layout, sturdy structure helps ensure the strength and durability. Item Type: Stair Gauge Knob Material: Aluminum Alloy Size: Diameter: Approx. 1.96cm / 0.77in, Length: Approx. 4.2cm / 1.65in Gross Weight: Approx. 89g/3.1oz Package Included: 1 x Stair&nbspGauge&nbspKnob