4mm-12mm x 1mm Steps ,Hss Step Drill
Made from high-alloyed tool high-speed steel.
The ideal tool for sheet metal It is suitable for all standard
industrial materials: nonferrous metal, special steel, thermoplastics and duroplastics as well as sheet metals up to 4,0 mm thickness.
These robust tools can be centred, drill in and out and de-burr in one motion. The deep-cut grooves of the stepped bit offer a clean drive and great cutting performance. The cone makes pulling back from the bore easier.
Hole diameters in 10 steps: 4, 5, 6, 7, 8, 9, 10, 11, 12, 14mm