HSS M35 Cobalt Hex-Shank 3-12 mm Spiral Step Drill Bit

HSS M35 Cobalt Hex-Shank 3-12 mm Spiral Step Drill Bit

This HSS 3-12 mm step drill bit is crafted from M35 cobalt high-speed steel, designed for durable and efficient performance. With a 1/4" hex shank, it fits securely into most drills and minimizes slippage — especially useful for work on stainless steel, iron, brass, aluminum and other soft metals. The spiral flute design helps with chip removal and heat dissipation, making it ideal for enlarging existing holes or drilling fresh ones without frequent bit changes. Whether you're a professional fabricator or a DIY enthusiast, this compact yet powerful bit delivers clean, consistent hole sizes across a versatile 3-12 mm range.

Features

• Made of M35 cobalt alloy for superior wear resistance and high-temperature strength.
• Spiral flute design for fast chip evacuation and smoother drilling.
• Hex shank (1/4") ensures firm grip and prevents bit slippage in the chuck.
• Wide size range (3–12 mm) allows drilling multiple hole diameters with one bit.
• Split-point tip helps to self-center and start holes cleanly without a pilot.

Specification

• Brand: Oubit
• Product Type: Step Drill Bit
• Size Range: 3–12 mm
• Material: M35 Cobalt HSS
• Shank: 1/4" Hex