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Gold TiAlN coated cobalt steel step drill bit, 95 mm long, 35 mm wide, tri-flat shank

VEVOR

VEVOR Step Drill Bit 3/16-1-3/8" TiAlN 4-Flute 3/8 Tri-Flat

SKU CH-ENVT-M3BYR

Covers nineteen sizes from 3/16 to 1-3/8 inch with a 118° tip and four-flute design for clean holes in metal, wood and plastic

  • TypeOther Appliances
  • Width1.57
  • Cobalt high-speed steel with TiAlN coating resists wear and stays sharp
  • 118° tip and four-flute spiral clears chips fast and reduces heat
  • 3/8" tri-flat shank locks securely into standard drill chucks
  • Drills metal, stainless steel, wood, plastic and fiberglass cleanly
  • Compact 95 mm length and 0.47 lbs weight for easy handling

Multi-Size Step Drill Bit

This VEVOR step drill bit covers nineteen sizes from 3/16 to 1-3/8 inch in a single tool. It is made from M35 cobalt high-speed steel with a TiAlN coating for wear resistance. The 118° tip and four-flute spiral design clear chips quickly and reduce heat buildup. A 3/8 inch tri-flat shank fits standard drill chucks for secure, quick changes.

Sheet-Metal And General Fabrication Users

The bit suits electricians, plumbers and metalworkers who drill thin stainless steel, aluminium, plastic or fiberglass and want fewer bit changes. It is not designed for deep-hole drilling in thick plate or for high-volume production runs that demand dedicated carbide tooling. Buyers needing a full set of individual twist drills or a bit for hardened steel should look elsewhere.

Simple Chuck Installation

Insert the triangular shank into any 3/8 inch or larger drill chuck and tighten normally; the tri-flat faces prevent slipping under torque. No adapters or special drivers are required. The most common issue is applying excessive feed pressure, which can overheat the coating and dull the cutting edges prematurely. Use cutting fluid and moderate speed for best results.

Highlights

  • Cobalt high-speed steel with TiAlN coating resists wear and stays sharp
  • 118° tip and four-flute spiral clears chips fast and reduces heat
  • 3/8" tri-flat shank locks securely into standard drill chucks
  • Drills metal, stainless steel, wood, plastic and fiberglass cleanly
  • Compact 95 mm length and 0.47 lbs weight for easy handling

Specifications

TypeOther Appliances
Width1.57

Questions about this item

Does the 3/8 inch Tri-Flat shank fit my standard drill chuck?

The 3/8 inch Tri-Flat shank is designed for quick, secure changes and fits almost all standard drill chucks.

Will the 118° tip and four-flute design clear chips cleanly in the stainless steel sheets I already work with?

The 118° tip combined with four spiral flutes provides fast chip clearing and reduced heat buildup for clean holes in stainless steel.

How can I verify the bit is cutting true after I start drilling?

Check that each of the nineteen steps produces a clean, burr-free hole without excessive heat or vibration during the cut.

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