Protractor Head, Reversible, Compatible with Manufacturer Model Number 11H-12-4R, 11HC-12-4R, C11H-12-4R, Compatible with Grainger Part Number 26Y957, 2ZUR1, 3AEP9, Head Type Reversible Protractor, Finish Smooth, Material Chrome, Compatible Square Type Bevel Protractor, Combination Set, Combination Squares, Product Type Head, Color Black, Compatible Blade Width 1 in, Overall Length 4 in, Overall Width 1 in