Description:4pcs HSS 1\/4 Hex Shank Countersunk Drill Bit Tapper Tool Set<br>Material: High Speed Steel 4241Black chamfer drill material: 45 steelShank: 1\/4 HexColor: BlackWeight: 100GQuantity: 4pcs Drill bits with WrenchScope: Can drill out sunk hole for screw cap while drilling the screw hole，and keep them on the same axial; Suitable for the drilling machines with collets or adapters; Suitable for drilling hard woods.<br>Specification: <br>          Chamfer Drill       Size       Length           6#       2.38mm       55mm           8#       2.78mm       60mm           10#       3.175mm       65mm           12#       3.56mm       70mm   <br>Package included:1x 6# Drill Bit1x 8# Drill Bit1x10# Drill Bit1x 12# Drill Bit1x Wrench