Both ends of the probe can be rotated 360°, and spiral stairs are also suitable. The middle part of the connecting rod is hollowed out, bolts can be installed, and the length can be adjusted according to needs. Compared with the traditional tape measure, this product is specially designed for shelf layout and stair measurement. Suitable for the shape of the staircase, easy to operate, easy to accurately measure the size, saving your time. The adopts black treatment, it is not easy to rust in humid environment, and does not fade, the is smooth, and the color is classic. Made of high quality stainless steel, and . The scale is laser etched with high . A set of stair rules contains both ends of the probe, the middle of the connecting rod, bolts, nuts. The connecting rod has three sizes, which can be combined at , suitable for most of the domestic staircase sizes on the market. Can be widely used in a variety of woodworking environment, specially designed for the layout of wooden stair treads, vertical boards, shelves, closets, windowsills. Used as a measuring or cutting aid, it is a good choice for carpentry professionals or DIY woodworkers., Manufacturer: Akfldms