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Irwin 1/4" Left Hand Mechanic's Length Cobalt HSS Drill Bit

Irwin 30516
SKU IRW-30516
Irwin 1/4" Left Hand Mechanic's Length Cobalt HSS Drill Bit

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With a solid gold oxide finish, this drill bit has been eight percent cobalt alloyed for higher heat and abrasion resistance. Its tough metal drilling, that is made for drilling into hardened steel bolts for creating pilot holes for screw extractors.

  • Cutting Diameter: 1/4 in.
  • Flute Length: 1 3/4 in.
  • Overall Length: 4 in.
  • Cutting Edge Material: HSS-E (Co-M42).
  • Finish: Gold Oxide.
  • No. of Flutes: 2.
  • Point Angle: 135 degree.
  • Point Shape: Split Point.
  • Shank Type: Cylinder.
  • Spiral Angle: CCW.
  • Structure: Solid.
  • Type: HSS Drill Bit.

Similar Drill Bit Products

Irwin 30516 Description

With a solid gold oxide finish, this drill bit has been eight percent cobalt alloyed for higher heat and abrasion resistance. Its tough metal drilling, that is made for drilling into hardened steel bolts for creating pilot holes for screw extractors.

  • Cutting Diameter: 1/4 in.
  • Flute Length: 1 3/4 in.
  • Overall Length: 4 in.
  • Cutting Edge Material: HSS-E (Co-M42).
  • Finish: Gold Oxide.
  • No. of Flutes: 2.
  • Point Angle: 135 degree.
  • Point Shape: Split Point.
  • Shank Type: Cylinder.
  • Spiral Angle: CCW.
  • Structure: Solid.
  • Type: HSS Drill Bit.

Similar Drill Bit Products

$11.17Each
In Stock-

Ships between 03/16/2026 - 03/18/2026

Country of Origin

Made in the U.S.A.
This item is proudly made in the United States of America.

Irwin
Visit The Irwin Store
See more Irwin Vise-Grip HSS Drill

Product Specifications

Part Number30516, 585-30516
Country of OriginUSA
Weight0.03-lb
UPC024721305169

Shop Top 100 Tools & Hardware Products.

View other Drill Bit Best Sellers.

Manufacturer Description

1/4" Left Hand Mechanic's Length Cobalt HSS Drill Bit

  • Tough metal drilling made for drilling into hardened steel bolts for creating pilot holes for screw extractors. 8% Cobalt alloyed for higher heat and abrasion resistance. Shorter drill for additional strength. Heavy-duty web construction for strength and du
  • Cutting Diam: 1/4 in
  • Finish: Gold Oxide
  • Type: HSS Drill Bit
  • Weight: 0.05 lb
Prop65
Important PROP 65 InformationWarning: This product can expose you to chemicals, which are known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information, go to www.p65warnings.ca.gov. to CA residents.
Irwin 1/4" Left Hand Mechanic's Length Cobalt HSS Drill Bit
$11.17Each
In Stock-

Ships between 03/16/2026 - 03/18/2026

Country of Origin

Made in the U.S.A.
This item is proudly made in the United States of America.

Similar Drill Bit Products

Irwin 30516 Description

With a solid gold oxide finish, this drill bit has been eight percent cobalt alloyed for higher heat and abrasion resistance. Its tough metal drilling, that is made for drilling into hardened steel bolts for creating pilot holes for screw extractors.

  • Cutting Diameter: 1/4 in.
  • Flute Length: 1 3/4 in.
  • Overall Length: 4 in.
  • Cutting Edge Material: HSS-E (Co-M42).
  • Finish: Gold Oxide.
  • No. of Flutes: 2.
  • Point Angle: 135 degree.
  • Point Shape: Split Point.
  • Shank Type: Cylinder.
  • Spiral Angle: CCW.
  • Structure: Solid.
  • Type: HSS Drill Bit.

Product Specifications

Irwin
Visit The Irwin Store
Part Number30516, 585-30516
Country of OriginUSA
Weight0.03-lb
UPC024721305169

Shop Top 100 Tools & Hardware Products.

View other Drill Bit Best Sellers.

Manufacturer Description

1/4" Left Hand Mechanic's Length Cobalt HSS Drill Bit

  • Tough metal drilling made for drilling into hardened steel bolts for creating pilot holes for screw extractors. 8% Cobalt alloyed for higher heat and abrasion resistance. Shorter drill for additional strength. Heavy-duty web construction for strength and du
  • Cutting Diam: 1/4 in
  • Finish: Gold Oxide
  • Type: HSS Drill Bit
  • Weight: 0.05 lb
Prop65
Important PROP 65 InformationWarning: This product can expose you to chemicals, which are known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information, go to www.p65warnings.ca.gov. to CA residents.

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