M35 Cobalt Four Spiral Flute Step Drill Bits,1/4”-3/4″(9 Step Size) Impact

Its toughness and bending strength are higher than that of ordinary high-speed steel, which is better for hard materials. Included Components: M35 Cobalt HSS Step Drill 1/4”-3/4″. M35 Four groove step drill: The ordinary step drill is easy to flex during the cutting process, but the four groove step drill is more stable in the cutting.

M35 Cobalt Step Drill Bit Set, Four Spiral Flute Unibit Step Drill Bits (1/8″…

M35 COBALT HSS – For hard materials, M35 cobalt HSS is the way to go. With its high hardness (HRC 64-66), red hardness, and wear resistance, it’s perfect for the toughest jobs. FOUR FLUTE STEP DRILL BIT – Deflection during cutting is a common problem with ordinary step drills, but our four flute step drill bit is designed to provide greater stability.