The extra tall stair gauge body enables it to clear over edges and irregularities in your work piece, giving you an accurate framing jig layout every time.Used for stair layout, rafter layout, marking repetitive angles, and as a rip guide on your sawThe rubberized grip enables the gauges to securely clamp on to any carpentry square with minimal tightening to the thumbscrew.Made of high quality material with a black oxide stainless steel thumbscrew, tough and durable.stair gauges knobs set come with Anti-lost holder and carabiner, make you easy to carry and storagecolor:BlueMaterial:Aluminum alloyPackage Contents:1 x Framing Square Attachment JigsOnly the above package content, other products are not included.Note: Light 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.