Serviceable Quality : stair gauge is made of quality aluminum alloy with anodized surface, stable in structure, serviceable and , sturdy and light, hard to or deform, a practical tool for your accurate layout Accurate and No : holder is featured with a hexagonal plane, more fitting borders than circles, and it is , keeping the ruler perpendicular to the material, making your marks more precise; Moreover, the thumbscrew increases friction and prevents , so you 't have to worry about gripping and tightening it while wearing gloves Versatile to Apply: stair gauges for framing square are functional and multi , perfect supplies for stair stringers layout, rafter layout, marking repetitive angles, guiding saws and so on, making your woodworking and other jobs efficient Clip Design: framing tools are equipped with clips, thus you can clip to your belt, work bag, wall hook and other , to prevent from being lost and falling, and it is convenient to and access when you need Warm Tips: jig framing square gauge is suitable for most framing squares, rafter and carpenter squares under 8 mm thickness Colour:blue+black Material:Aluminum alloy Package Contents: 2 x Square Stair Gauge with Brackets 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 a little different from the real thing. The measurement allowed error is +/- 1-3cm.