Fangrui Product Details [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, Corr