Aluminum Alloy Construction: The Tall Stair Gauges are crafted from aluminum alloy with an anodized finish, ensuring a stable, robust, and structure that's to breaking or deformation Accurate: This product has a hexagonal plane that fits borders a circle, and it's taller so that the ruler is perpendicular to the material, making your marks more precise Easy to Use: These stair gauges are great for repetitive work, marking and cutting on rafters, trusses and stairs Wide Use: The woodworking square gauge knob tool is suitable for framing squares, circular saws and carpentry squares, and a variety of angle rulers can be used, with a stable and firm clamping Convenient: the set includes 2 auxiliary clips,1 hook, which can keep the gauge organised and easy to use in the project These stair gauges are great for repetitive work, you don't have to readjust the frame squares each time to mark step. your run and rise on stairs is very consistent. So not only do they make your stair building job faster and easier, they are also a great tool for improving accuracy. Multipurpose Tool: Suitable for framing squares, circular saws and carpentry squares, this set of tall stair gauges is a versatile tool for a variety of construction projects. Product name:Tall Stair Gauges Size:auxiliary clip: 3.8x2.5x1.5x0.7cm Colour:A:Black Material:aluminum alloy Package Contents: 2 x Auxiliary Clips 1 x Hook 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 picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.