产品名称：3支装阶梯钻

产品详细说明：

4-30mm SHEET METAL STEP DRILL SET-HSS

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.

3-Piece Stepped Cone Drill Set

Sizes: 4-12mm (8-step, 6mm shank), 4-20mm (8-step, 8mm shank) and 4-30mm (13-step, 10mm shank).