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 will, suitable for most of the domestic staircase sizes on the market. 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. 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 precision. Compared with the traditional tape measure, this product is specially designed for shelf layout and stair measurement. Suitable for the of the staircase, easy to operate, easy to accurately measure the size, saving your time. Can be widely used in a 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 or DIY woodworkers. A ruler set designed for stair shelving. Weight (kg.): 1.224 Assembled Length (cm.):46.0 Assembled Width (cm.):9.6 Assembled Height (cm.):4.0 Stair tread template tool enables the treadle installer to measure the length and angle easily and accurately without a measuring tape. Easy to use and save plenty of time for measurement. Used as a measuring or cutting aid, it is a good choice for carpentry or DIY woodworkers. Colour:Black Material:Stainless Steel Package Contents: 1 set x Stair Treads Gauge Template Tool Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.