M2 Step Drill Bit Set for Metal, 3/8" Hex Shank, 1/4"-1-3/8" Step Bits

M2 Step Drill Bit Set for Metal, 3/8" Hex Shank, 1/4"-1-3/8" Step Bits

• Spiral Flute Step Drill Bit for Metal: Our step drill bit features an innovative spiral flute design, precision-machined to reduce walking and improve drilling stability. It delivers up to 3x faster drilling than conventional step bits with less vibration, helping create smooth, accurate holes in metal with professional results.
• M2 Cobalt Step Drill Bit: Made from premium M2 cobalt high-speed steel with heat treatment, this cobalt step drill bit offers excellent toughness, wear resistance, and bending strength compared with standard HSS. It is built for drilling stainless steel, mild steel, aluminum, plastic, and other materials.
• Upgraded 3/8" Shank for Higher Torque: Unlike standard 1/4" shank step bits, this 1/4"–1-3/8" step drill bit is upgraded with a stronger 3/8" shank for a more secure grip and better torque resistance. The reinforced shank helps reduce slipping, twisting, and breakage under heavy drilling pressure, making it more durable for demanding metal work.
• AlTiN Coated Step Bit with 67HRC: The Aluminum Titanium Nitride coating provides up to 67HRC hardness, helping improve heat resistance, wear resistance, and corrosion protection. This tough coating extends tool life and maintains consistent drilling performance during repeated use.
• Versatile Size Step Drill Bit: This step drill bit covers 1/4" to 1-3/8" sizes in one tool, allowing you to drill multiple hole diameters without constantly changing bits. It is ideal for sheet metal, electrical boxes, metal plates, plastic panels, and general repair or installation work.
• Usage Notes: Use on mild steel up to 1/8" thick or stainless steel up to 1mm thick. Always apply cutting oil or coolant during continuous operation. Start at a slower speed for better control, then increase speed gradually. Avoid excessive feed pressure or forcing the bit when it gets stuck.