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HSS Countersink Drill Bit Set 4pcs
HSS Countersink Drill Bit Set 7pcs
HSS Countersink Drill Bit Set Details 01
HSS Countersink Drill Bit Set Details 02
HSS Countersink Drill Bit Set Details 03

HSS Countersink Drill Bit Set

(Size: 4pcs/7pcs 3mm-10mm) - Free Shipping
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3mm-10mm HSS Countersink Drill Bit Set for Reamer Woodworking

Made from heat-treated high-speed steel, this countersink drill bit lets you quickly chamfer holes in wood, metal and other materials. It is ideal for countersinking holes to accept flat-head screws, and for chamfering or deburring the rim of a hole in wood, plastic or soft metals.

Package & Shipping:

  • Free shipping all over the world
  • 1 Set Countersink Drill Bit
  • To Korea, Japan : it take about 7-10 days
  • To USA, CA, Spain, France, Poland, Belgium, Portugal, United Kingdom, Germany, Italy and Netherlands: it take about 12 - 20days
  • To other European countries and Ukraine,Belarus,Russian Federation: it take about 15-30 days
  • To other countries: it take about 20-35 days


  • Four piece set includes bits for drilling pilot holes for screw sizes 3mm, 4mm, 5mm, 6mm.
  • Special designed steel counter sleeve countersinks or counterbores pilot hole.
  • Drilling length can be adjusted for various length screws simply by loosening and tightening the setscrew.
  • Chamfer is 5 flutes, In the process of using, can discharge the wood more rapid, sink hole disposable drilled smooth, screw cap perfect embedded in the surface of workpiece.


  • Material: High Speed Steel
  • Shank: Round Shank
  • Size Including: 3mm 4mm 5mm 6mm

What are round shank drill bits?

The shank is the end of the drill bit that fits into the drill and is secured by the chuck. A round shank helps to center a bit in the chuck more accurately. The flat surfaces on a hex shank allow the chuck to grip the drill bit more securely.