Stair Tread Template Tool - Contains 2pcs 8inch connecting rods, 2pcs 12inch connecting rods, 2pcs 16inch connecting rods, 2pcs 8inch template head, 10pcs screws, 10pcs knobs. Accurate Measurement - Made of and strong stainless steel which is to wear and tear, with clear laser scales on the , reducing the risk of error measurements in your projects. Rotational Template Heads - 360 degree rotational tread templates can be adjusted the angle by the nuts to fit and measure the regular or irregular shapes of stairs treads. Adjustable Length - The connecting rods can be used separately or combined in different combinations to adjust the length or height from 9inch - 54inch to meet more needs in your projects. Wide Applications - The stair tread gauge is versatile and can be used to measure a wide range of surfaces, including stairs, arches, curves, and more. This versatility makes it an essential tool for anyone working on a renovation or construction project., Manufacturer: CTRLZS