1Aluminum Alloy Material: Stair gauges are made of anodized aluminum alloy. Hex plane is more frictional and can work better.2Lengthened Size: Perfect for stair stringers 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 frame square, the ruler marks can be seen through the concave cut when the gague is fully inserted, increase visual field area.4Multiple Functions: Stair stringers and Rafter layout, rip guide for circular saw, framing square attachment, using on square to mark repetitive angles, using on square to guide saw to make angle cuts.5Dedicated Storage: The gauge is equipped with steel wire rope to provide a dedicated storage place to prevent loss. They are also very light and easy to store. It can be hung on the work bag, magnetic tool storage panel and storage rack.