4pcs HSS 1/4 Hex Shank Countersunk Drill Bit Tapper Tool Set

Description: 4pcs HSS 1/4 Hex Shank Countersunk Drill Bit Tapper Tool Set Material: High Speed Steel 4241 Black chamfer drill material: 45 steel Shank: 1/4 Hex Color: Black Weight: 100G Quantity: 4pcs Drill bits with Wrench Scope: 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. Specification: Chamfer Drill Size Length 6# 2.38mm 55mm 8# 2.78mm 60mm 10# 3.175mm 65mm 12# 3.56mm 70mm Package included: 1x 6# Drill Bit 1x 8# Drill Bit 1x10# Drill Bit 1x 12# Drill Bit 1x Wrench