[ High quality ]: Our stair gauges Layout Tool tool is made of aluminum alloy, compact and sturdy enough to be used frequently without breaking easily, and can be easily attached to your framing square for added convenience and efficiency in all construction projects. [ Wide application ]: Framing square stops Attachment Jigs are versatile and widely used tools designed for framing squares, making it easier and more accurate to measure and mark angles and cuts in woodworking and construction projects. [ Non-slip ]: The large knurled screw has a non-slip thread, making it easy to tighten onto any framing square even when working with gloves, allows for quick adjustments during use. [ Package Includes ]: 2 sets of tall stair gauge for speed square.It perfectly fits for stair layout, rafter layout, marking repetitive angles, etc. Please note:Slight color difference or difference in kind, does not affect the use, please do not mind, thank you! Colour:Black+Red Material:Aluminum Alloy Package Contents: 2 sets of tall stair gauge for speed square 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.