22Pc Countersink Drill Bit Set W/Adjustable Depth Stop Collars Counterbore Drill

7 piece Countersink bit set is the perfect addition to any woodworkers's tool box.

• Made for drilling pilot holes for screw sizes 5mm, 6mm,7mm,8mm,10mm.11mm.12mm
• FLEXIBILITY, REMOVABLE and ADJUSTABLE: It‘s convenient to use the combination of Hex Key to adjust or disassemble the countersink drill bit and the five-flutes chamfering.
• High speed heat treated steel:countersink drill bits are made of high speed steel, QUENCHING treatment, so they are HIGH HARDNESS, WEAR-RESISTING and DURABLE.
• Applies to:drilling machinery with chuck or joints
• Seven Stop Collars, Bit sizes: 1/8", 9/64", 5/32", 11/64", 3/16", 13/64", 7/32"