Dope Pro Grade 5 Piece Counterbore Drill Bit Set With HSS Aluminum Straight Shank Four Flute End Mills M3 To M8 Pilot Slotting Countersink Counterbore Cutter For Bolt Heads And Screw Recesses In Metalworking
✔️ Heavy HSS-AL steel, 5 pcs, M3 to M8 sizes, heat-treated
This five-piece countersink set is designed for metalworking tasks like creating flush bolt-head recesses and clean screw slots. It’s commonly used on milling machines and drill presses where precision and efficient tool changes matter.
✅ Material: HSS-AL super-hard high speed steel
✅ Hardness: HRC 65 to 68
✅ Sizes and dimensions: M3, M4, M5, M6, M8 with precise boot, blade, shank, and full-length measurements (see spec table)
✅ Applications: countersinking holes for bolt heads and screw recesses in copper, aluminum, steel, cast iron
✅ Package: 1 set (5 pieces)
💡 What is a countersink drill bit set used for? It’s handy for creating flush bolt head recesses and clean screw slots in metalworking. - Countersinking holes for bolt heads - Creates clean seating for screws in copper, aluminum, steel, cast iron - Works with milling machines or drill presses