cromwell 3支套阶梯钻(图)

3支装阶梯钻Category: Cutting Tools > Drilling > Maintenance Drills > Taper Drills > Sheet & Tube Drills3 Piece HSS Stepped Cone Drill Set3 piece stepped cone drill set manufactured from high speed steel, resulting in long tool life and extra durability. Each step produces specific sized, parallel holes, with the maximum material thickness being determined by the length of step. The drills are capable of producing or enlarging holes in sheet metals without the need for centre punch or pilot holes, and are designed for use with power tools or pedestal drilling machines for an extensive range of industrial applications.

Sizes:4mm-12mm (8 step), 4mm-20mm (8 step) & 4mm-30mm (13 step).