Serviceable Quality Selection: our stair gauge is made of quality aluminum alloy with anodized surface, stable in structure, serviceable and reliable, sturdy and light, hard to break or deform, a practical tool for your accurate layoutAccurate Mark and No Slip: holder is featured with a hexagonal plane, more fitting borders than circles, and it is taller, keeping the ruler perpendicular to the material, making your marks more precise; Moreover, the thumbscrew increases friction and prevents slip, so you don't have to worry about gripping and tightening it while wearing glovesVersatile to Apply: our 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 Design: framing tools are equipped with clips, thus you can them to your belt, work bag, wall hook and other places, to prevent them from being lost and falling, and it is convenient for you to get and access them when you need themWarm Tips: jig framing square gauge is suitable for most framing squares, rafter and carpenter squares under 8 mm thicknessColour:blue+blackMaterial:Aluminum alloyPackage Contents:2 x Square Stair Gauge with BracketsOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.