[ 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. [ 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. [ Package Includes ]: 2 sets of tall stair gauge for .It perfectly fits for stair layout, rafter layout, marking repetitive angles, etc., Weight: 0.22487150724 pounds, Manufacturer: tiyao