Harbor Freight Tools


Cobalt Steel Step Drill Bit Set, 3 Pc.

Get 3X faster* hole cuts and 4X longer life* with these super-hard cobalt alloy step drill bits.

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Product Overview

HERCULES™ super-hard cobalt alloy step bits stand up to heat and tough materials to stay sharper longer. The step drill bits automatically deburr holes as you drill and the spiral-flute design provides faster, smoother cutting. StarterPoint™ No-Walk Fast Start provides quick clean holes in materials from wood to stainless steel.

  • Industrial strength cobalt steel construction for drilling through the hardest materials including stainless steel
  • Spiral flute design with StarterPoint™ cuts faster and runs cooler for longer bit life
  • Laser-engraved reference marks for accurate drilling
  • Three bits for 28 hole sizes from 3/16 in. to 3/4 in.

Important Information

  • * Based on stated specification of our standard product


64672, 64673
Cobalt steel
Shipping Weight
0.26 lb.
#2 - 6 Hole Sizes: 3/16 in., 1/4 in., 5/16 in., 3/8 in., 7/16 in., 1/2 in.;#3 - 9 Hole Sizes: 1/4 in., 5/16 in., 3/8 in., 7/16 in., 1/2 in., 9/16 in., 5/8 in., 11/16 in., 3/4 in.; #1 - 13 Hole Sizes: 1/8 in., 5/32 in., 3/16 in., 7/32 in., 1/4 in., 8/32 in., 5/16 in., 11/32 in., 3/8 in., 13/32 in., 7/16 in., 15/32 in., 1/2 in.
Shank size
1/4 in.
CA Residents
Warning - Prop 65 Info
Note: Specifications are approximate and subject to change


We guarantee this product to be free from defects in materials and workmanship 90 days from the date of purchase. Limitations apply.