Description: 【Durability】Made of CNC precision machined aluminum alloy, the Tall Stair Gauges is rust resistant and sturdy. 【Precision】The Stair Gauges Tool features a hexagonal flat design that fits the edges better than a circle; the raised body allows the ruler to be placed completely vertically, achieving stable and precise clamping. The concave cut enhances the visibility of the ruler's markings, facilitating accurate alignment. 【Convenience】The Framing Square Attachment Jigs comes with an anti loss bracket and a portable hook for easy carrying and storage. The hook can also double as a bottle opener, adding to its versatility. 【Multi functionality】The Stair Gauges Knobs Tool is suitable for stair joist layouts, rafter layouts, frame ruler attachments, stair handrail guides on frame rulers, circular saw cutting guides, and for marking repeating angles using a woodworking ruler. 【Packaging】Includes 2 Framing Square Stop, ensuring you have the right tool for any project. Specification: Material: Aluminum Alloy    Size Chart: Packaging size:7cmx6cmx1.6cm/2.76inchx2.36inchx0.63inch Package Includes: 2 Stair Gauges Knobs Tools Note: Please allow slightly errors due to manual measurement and different monitors.