Harbor Freight Tools


Cobalt Steel Step Drill Bit Set, 2 Piece

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

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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
  • Two bits for 23 hole sizes from 3/16 in. to 1-3/8 in.

Important Information

  • * Based on stated specification of our standard product

64647, 64649
135 °
Shipping Weight
0.61 lb.
#5 - 11 Holes Sizes: 1/4 in., 25/64 in., 35/64 in., 11/16 in., 13/16 in., 7/8 in., 1 in., 1-1/8 in., 1-7/32 in., 1-1/4 in., 1-3/8 in., #4 - 12 Hole Sizes: 3/16 in., 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., 13/16 in., 7/8 in.
Shank size
3/8 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.