Nuluxi Countersink Twist Drill Bits Set Chamfer End Milling Countersink Drill Woodworking Chamfer Drill Bit Set with Hex Wrench Ideal for Production Maintenance or Portable Drilling Jobs(7 Pieces). Premium Material&Multiple sizes:7 pieces Countersink Drill Bit includes bits for drilling pilot holes for screw sizes 3mm, 4mm, 5mm, 6mm,7mm,8mm,10mmwith hex key.
eBay