1. Make Life Easy: The new Carpentry Edge Rule simplifies your life by wrapping around the edge of the inventory and providing precise proportions on both sides. 2. Necessary Tool: Even the most skilled woodworker challenges when it comes to accurate angular placement on large panel projects. You can try to extend the production line from a small protractor, but even a small error will make the production line extend farther and the greater the error. 3. More Precise: Our latest precision rulers can provide unparalleled precision for your panel layout work. 4. Two Style for Option: There are two . You can choose the angle of 90 degrees or 45 degrees according to your need. 5. Suitable for: It is your Perfect choice for DIY and professional work, creating , angles and precise measurements for engineers, draftsmen and . size: 15cm Material: Aluminum+ABS colour: red+silver Package Contents: 1 x 6in right angle caliper 1 x 6in triangle caliper 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.