aluminum alloy material: This 16 -faced multi -angle measuring ruler is made of high -quality aluminum alloy. They can be used for a long time without worrying about corrosion, which ensures the durability of the polynoma measuring ruler. Folding and adjustable: The multi -angle measuring ruler has 16 signs and 16 knobs, which can be freely folded and adjusted. You can place any shape you need, fast, convenient and accurate to help you measure the angle accurately. Easy to use: 1. Find the position of the hole and tighten all the knobs. 2. Move the ruler to the tile and mark the hole. 3. Drill a hole in the place you label. 4. Paste the tiles . Accurate angle measurement tool: This angle angle detector is a laser carving mark (inch and centimeter), which is very suitable for precise angle measurement. With the angle of the paving tools composed of 16 parts, you can adjust the drilling position to accurately mark the tank. Metal quarrel angle measuring device is an Perfect hole positioning measurement tool. Widely used: very suitable for woodworking, tiles, tiles, wood, glass, stone, layer pressure, construction and engineering projects! It can also replace the corner ruler and straight ruler, which is widely used in different fields. Material: Metal colour: As shown Package Contents: 1 x Measuring Ruler 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.