[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 1/4 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 precision 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.