The US PRO 3pc HSS Step Drill Bit Set with a titanium coating offers enhanced durability and performance for various drilling tasks. This set is perfect for precision drilling in a range of materials. Fully Polished : For a smooth finish and reduced friction. Titanium Coated : Increases the drill's lifespan and cutting efficiency. Supplied in a Metal Case : Ensures easy storage and organisation. Specification: Size 1 : 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30mm Size 2 : 4, 6, 8, 10, 12, 14, 16, 18, 20mm Size 3 : 4, 5, 6, 7, 8, 9, 10, 11, 12mm Angle : 118 Degree Split Point DIN Standard : 338 Material : HSS 4241