4pcs/set Countersink Deburring Drill Bit

Make clean, accurate conical holes even in the toughest material with the 4pcs/set Countersink Deburring Drill Bit. These bits leave smooth, burr-free edges on a variety of materials with an 82-degree chamfer that creates a snug resting place for countersunk screw heads. 4 PIECE PER SET The set includes four drill bits with sizes ranging from 2-5mm, 5-10mm, 10-15mm, and 15-20mm to meet all your drilling needs. The bits’ round shanks allow use with a wide variety of tool holding systems including drill press and hand held drills. CAN CUT THROUGH TOUGH MATERIALS These bits create smooth, burr-free edges without smearing and are perfect for chamfering and countersinking holes on soft metal, steel, iron, wood, and plastic. CROSS-HOLE, ZERO FLUTE DESIGN The bits have no flutes and instead of sharpened cutting edges, they have a hole bored through their cones at an angle. As the bits spin, the trailing edges of their holes make the cut. This design prevents chips from clogging in the workpie