Efficient Stair Gauge: compatible with speed square, framing or carpentry square, this stair gauge locks on to standard step heights in 10 seconds, eliminating the need for traditional repetitive adjustments, allowing for error-free stair stringing and repetitive measurements, and reducing layout time by up to 40% compared to traditional fixtures Rugged and Durable Quality: CNC precision milled + aerospace grade anodized aluminum alloy for unmatched durability and resistance to rust, corrosion, and abrasion, withstands over 50,000 operating cycles, a must-have framing jig for outdoor woodworking Portable Design and Organized Storage: The framing square stops is designed with user convenience in mind, featuring an ingenious anti-loss holder and a compact hook so that it can be easily carried and stored All-Around Stair Gauge Tool: Supercharge your carpentry projects with these incredibly versatile stair gauges. Theyre a perfect fit as an add-on for your trusty frame square. Whether you're installing stairway beams, making repeated marks at multiple angles on a miter square, or guiding a circular saw to make precise angle cuts, this stair gauge has you covered Product Specs: Contents: 2 stair gauges with holder hook. Dimensions per gauge: 1.85" x 0.71" x 0.71" (4.7 cm x 1.8 cm x 1.8 cm). Compatibility:Stair gauge for speed squares, framing squares, triangle squares, rafter squares, or carpenter squares up to 0.315" (8 mm) thick