Durable Aluminum Alloy Material: This multi-angle measuring ruler is made of premium 5mm aluminum alloy, will not break or rust, more durable and sturdy than the plastic ruler. Say no to your flimsy jig tool Upgraded Angle Measuring Ruler: This angle ruler has 16 pieces with metal knobs and drilling locator, you can adjust all 16 knobs metal to create the desired shape precisely, then find the position to drill the correct hole. With its 16 folding sides, users can easily create and measure special angles or shapes with the angle finder tool to improve work efficiency. Precise Angle Measuring Tool: This angle finder is laser engraved (inches and centimeters) perfect for accurate and precise angle measurements. With the 16-part corner tiling tool, you can adjust the drilling position to mark tiles precisely. The metal angle protractor is an ideal measuring tool and built-in hole positioning. Easy to use: 1. Find the hole position, tighten all the knobs. 2. Move the ruler across the tile and mark the hole. 3. Drill a hole at the location you marked. 4. Place the tile on the wall. Widely used: It is very suitable for woodworking, brick, ceramic tile, wood, glass, stone, laminate, construction and engineering projects It can also replace angle ruler and ruler, widely used in different fields. Size: Total length 240cm Quantity: 1 piece Color: black red