[Multi-Angle Measurement] This 3D multi-angle measuring ruler is designed with 1/16-inch increment scribing holes so you can draw parallel lines to mark 22.5° to 90°. The aluminum square protractor includes preset angles of 22.5°, 30°, 45°, 60°, 67.5° and 75° for precise measurements and angle markings, as well as corresponding Φ1/4 angle pin holes(with a dowel pin). [Premium Material] Our woodworking square is made of premium aluminum metal, which has the characteristics of high hardness, , rust resistance, and wear resistance. The multi angle measuring ruler has undergone multiple polishing treatments on the outside, so it can be used for a long time without hurting your hands. [Precise & Easy to Read] The square woodworking ruler is laser engraved and has clear imperial scales for easy reading. The is easy to assemble and disassemble. Screw on the two included screws to get a 3D multi angle measuring tool. [Wide Applications] The woodworking square has the functions of measuring, correcting, marking, etc. And is suitable for any three-dimensional object, such as wood, marble, metal pipes, or others. You can give the multifunctional square tool as a practical gift to the engineers, carpenters, decorators, and DIY enthusiasts around you. Please note: the physical slightly color difference or difference, does not affect the use, please do not mind, thank you! Colour:Blue Material:Aluminum Alloy Package Contents: 1 x Woodworking Square 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.