General description Oxford Bevel Protractor Set is designed for precise angle measurement of machines, molds, and jigs. This set includes protractor head, 150mm (6"), 200mm (8"), and 300mm (12") plain rules, a height gauge, and acute angle attachments, all made from polished and hardened stainless steel for durability. Technical specifications Accuracy: + 1/2° Range: 360° (4 x 90° quadrants) Material: Stainless Steel Number of Pieces: 6 Size: 150mm (6"), 200mm (8"), 300mm (12") Compatibility and accessories Includes: Protractor head, 150mm (6") plain rule, 200mm (8") plain rule, 300mm (12") plain rule, acute angle attachments, height gauge Other information