Ensures stair treads are cut to fit the exact angle of the stair, accommodating the common issue of non-square treads. Features high-quality knobs and a strengthened top crossmember that provide superior clamping force during use. Equipped with clear, bold markings and a built-in ruler for precise measurements from 12 Inch down to 1/8 Inch increments. Serves as a versatile stair tread jig, gauge tool, and template tool, ideal for accurate stair installations. Allows for quick and accurate measuring and cutting of treads and risers, speeding up stair installations., Manufacturer: Marshalltown Company