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Item # 172966 OfficeMax # 24090993
  • 8% Cobalt for higher heat and abrasion resistance
  • Heavy-duty web construction for strength and durability
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  • 8% Cobalt for higher heat and abrasion resistance 
  • Heavy-duty web construction for strength and durability 
  • 135º split point begins drilling immediately, minimizing bit "walk" 

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Item # 172966 
Manufacturer # 585-63116  
Applicable Materials Hard Steel, Stainless Steel, Titanium
brand name Irwin®
Cutting Diam 1/4 in
Cutting Edge Material HSS-E (Co-M42)
distributor United, Inc.
Finish Gold Oxide
Flute Length 2 3/4 in
Length Group Jobber
Overall Length 2 1/2 in
packaging type Bulk
Point Angle 135°
Point Shape Split
Shank Type Cylinder
Spiral Angle CW
Structure Solid
Type Drill Bit
weight 0.04 lb

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Rated 3 out of 5�by 2 reviewers.
Rated 1 out of 5�by cobalt drill bits Bought a new set of bits yesterday and I needed to drill6 holes through both 1/8" & 1/4" Angle iron bed frame material. The cobalt bits I bought failed miserably, could hardly get it done. Ended up having to step drill to get 6 - 1/4" holes through the material. I won't buy Irwin bits again!! April 1, 2015
Rated 5 out of 5�by Mr. These cobalt drill bits are the only thing that will drill into hardened bolts and metals. I have tried standard bits on hardened metal before not knowing what grade the metal was. The standard bit dulls almost immediately so I reach for the cobalt bits. They will sink on through the metal with no problem. The only cons are they are more expensive and they will break easily if you put force perpendicular to the bit instead of linear. May 28, 2013
  • 2015-04-25T07:05:26.372-05:00
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