RS PRO 2-Piece Step Drill Bit Set for Metal, 31mm Max, 5mm Min, HSS Bits

HSS hole cutter with spiral tap
TiAlN coating, for particularly tough materials
For burr-free drilling and planing pipes, sheet metals and profiles, as well as moulding, retro drilling and expanding cut-outs
Suitable for construction steel, CrNi steel, non-ferrous metals, plastic, plexi glass and wood up to 5 mm thick
Crosswise grinding means no centre-punching necessary, drill bits do not run
Diameter guide lasered into the tap, legible even when rotating
Three-faced driving shaft, prevents slipping in the drill chuck

Not suitable for aluminium. Use without cooling agents.

Set, stock no. 499-302 contains 1 x 4 → 20 mm hole cutter and 1 x 5 → 31 mm