1、FOR WOODWORKING: Frame square attachment, stair instrument knob for circular saw, layout of stair string, use carpentry square to mark repeated angles, and use carpentry square to guide saw for angle cutting. 2、ALUMINUM ALLOY MATERIAL: The stair gauge is made of premium aluminum alloy with anodized surface, which is stable and durable. 3、HEX PLANE DESIGN: More suitable for edges rather than circles, with a higher body that makes the ruler completely perpendicular to the material, ensuring very stable and accurate clamping of the workpiece. 4、THUMB SCREWS: The staircase instrument is equipped with black oxidized steel thumb screws, which are anti slip and durable, easy to grip and tighten to any raft frame, and can be easily carried even when wearing gloves. 5、EASY TO USE: Compact and small size and being light in weight make the stair gauge set easy to use, take for better works.