Main Features:
● Bits for drilling pilot hole sizes: 3mm， 4mm， 5mm， 6mm.
● The diameter of the chamfering is 15.8mm
● Drill and countersink for wood screws without changing bits
● Drilling length can be adjusted for various length screws simply by loosening and tightening the setscrew
● Chamfer is 5 flutes， can discharge the wood more rapidly in the process of using， screw cap can perfect embedded in the surface of workpiece
● Material: HSS 4241
● Chamfer drill body material: Steel No.45
● Dimension: 3mm x 60mm / 4mm x 75mm /5mm x 85mm / 6mm x 93mm
● Shank: 1 / 4 hex shank