Twist Drill Bit:
Specification: 2mm / 0.08in , 3mm / 0.12in, 4mm / 0.16in , 5mm / 0.2in , 6mm / 0.24in , 8mm / 0.31in
Materials to be drilled: Thin iron aluminium plastic wood etc.
Construction Drill Bit:
Specification: 4mm / 0.16in , 5mm / 0.2in , 6mm / 0.24in , 8mm / 0.31in, 10mm / 0.39in
Materials to be drilled: ,Brick wall concrete cement stone etc.
Woodworking Drill Bit:
Specification: 4mm / 0.16in , 5mm / 0.2in , 6mm / 0.24in, 8mm / 0.31in, 10mm / 0.39in
Materials to be drilled: Solid wood particle board plywood etc.