3PCS Metal Step Drill Bit, 4-12/20/32mm Titanium Conical Triangle Metal Step Drill Bit, Hexagon Shank Step Drill Bit for Screwdriver on Metal Steel, Wood, Brass, Aluminum, Plastic

【DRILL BITS SIZE】 1 × (4-12 mm), 1 × (4-20 mm), 1 × (4-32 mm) step drill bit. The step drill bits come in three sizes to meet your different needs. The package includes a nylon bag. 【DOUBLE CUTTING BLADES】: The double cutting blades and X-type opening design ensure faster and smoother cutting; the 3-sided shank design prevents the drill chuck from slipping; With minimal pressure, these sets can cut through wood, sheet metal, steel, and other surfaces. 【HEX SHAFT】 The 1/4" (6.35 mm) hex shank works with most drills or power drills with a 1/4" chuck, fits securely into power tool chucks, and eliminates slippage. 【HSS & TITANIUM COATED】 Made of super-strong HSS steel and titanium coated, the titanium coating ensures easy cutting of steel, aluminum sheet, brass, copper, plastic, wood, etc. 【APPLICATION】 Suitable for sheet metal, sinks, automotive repair, etc. Widely used for drilling holes in a variety of materials such as plate, aluminum, insulation board, PVC board, and wood less than 5 mm thick.