1、FOR STAIR MEASURING: The stair tread tool set consists of connecting plates and measuring sheets, which are reusable and extendable, with accurate measurement. 2、DURABLE MATERIAL: Made of excellent 304 stainless steel and aluminum alloy materials, high hardness, wear resistance and corrosion resistance, and long service life. 3、ADJUSTABLE ANGLE: The sides of the measuring plate are all curved design, providing you with an angle of 0° to 300° and adjustable, easy to operate and combine. 4、SHELF LAYOUT TOOL: Adjusts to the width set by the stair tread template to provide the perfect layout for household stair treads, shelves and risers. 5、OTHER PARTS: Equipped with nuts, bolts and washer for easy fixing of the stair tread template, with accurate positioning and good stability.