1Aluminum Alloy Material: The stair gauges are made of anodized aluminum alloy. The hexagonal plane is more frictional and can work better. 2Lengthened Size: Perfect for stair stringer layout, rafter layout, etc. Easy layout on any material, especially when there are gaps in the edge of the wood. 3Recessed Cutout: Align them with the specific ruler marks on the frame square, the ruler marks can be seen through the concave cutout when the gauge is fully inserted, increase the area of the field of view. 4Multiple Functions: Stair stringer and rafter layout, circular saw cutting guide, framing square attachment, use on a square to mark out repetitive angles, use on a square to guide the saw to make angled cuts. 5Dedicated Storage: The gauge is equipped with a steel cable to provide a dedicated storage location to prevent loss. They are also very lightweight and easy to store. They can be hung on work bags, magnetic tool storage panels, and storage racks.