Serviceable Quality : stair gauge is made of quality aluminum alloy with anodized surface, stable in structure, serviceable and , sturdy and light, hard to break or deform, a practical tool for your layout and No Slip: holder is featured with a hexagonal plane, more fitting borders than circles, and it is , the ruler perpendicular to the material, making your marks more precise; Moreover, the thumbscrew increases friction and prevents slip, 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 purpose, 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 and other , to prevent from being lost and falling, and it is convenient for you 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 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.