Accurate - Crafted From Cnc-machined Anodized Aluminum Alloy Steel. Features Easy-to-read Precision Laser Engraved Scales. design - Internal Teflon O-ring Mechanism Swivels During Operation And Ensures Smooth & Precise Read On Inside/outside Corners. forget About The Guesswork - Two Scales Transfer Your Work Angle Directly To The Miter Saw For An Accurate Miter Cut, And Single Cut.features: it Has An Easy-to-read Precision Laser Engraving Scale. very Suitable For Woodworking Trimming, Plumbing And Other Various Woodworking Applications. two Scales Will Transmit Your Working Angle Directly To The Miter Saw To Achieve Accurate Miter And Single Cut. the Internal O-ring Mechanism Can Be Rotated During Operation And Ensures Stable And Accurate Readings On Both The Inner And Outer Corners. specifications: material: Aluminum weight: 0.2kg package Included: 1 X Protractor """"all Products From Us Have Undergone Strict Quality Checks. if There Is Any Quality Problem Or You Are Not Satisfied With The Product contact Us. we Will Give You The Best Solution."""""""