Ideal Replacement: This stair gauge can be easily used with fine workmanship, ideal replacement for the old and damaged parts. Thumb Screws: The stair gauge is equipped with black oxide steel thumb screws, which are non slip and durable, easy to grip and screw to any raft frame, and easy to carry even with gloves. Aluminum Alloy Material: The stair gauge is made of premium aluminum alloy, the appearance is anodized, wear resistance, resistance, strong and durable. Main Application: The stair gauge is mainly used for stair longitudinal beam layout, rafter layout, etc. It is easy to arrange on any material, especially when there is a crevice at the edge of the wood. Hex Flat Design: Hex flat design gauge is more suitable for edges rather than circles, the gauge block can be completely perpendicular to the material, very stable and accurate clamping of the workpiece.