EXACT 3-Piece Step Drill Bit Set for Metal, 30mm Max, 4mm Min, HSS Bits

HSS step drill with deburring zone for a better circular cut
TiAlN coating, for particularly tough materials
For burr-free drilling and planing sheet metal, pipes and profiles
Two-sided deburring in one move
No centre-punching necessary, drill bits do not run
Constant cutting angle during the whole process
Suitable for construction steel, CrNi steel and non-ferrous metals up to 6 mm thick
Diameter specification is lasered on every level
Three-faced driving shaft, prevents slipping in the drill chuck