HPMAISON M35 Cobalt Step Bit, 10mm 3-Flat Shank High Speed Steel 5% Cobalt Step Drill Bit (4-32mm, 15 Steps), Silver Titanium Spiral Grooved Cone Drill Bit Hole Cutter for Stainless Steel, Hard Metal
HPMAISON Cobalt Step Drill Bit is made of True 5% Cobalt M35 High Speed Steel Materials, 66-69 HRC, which provides the first-class heat, wear and chip resistanc...