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Irwin 5/16" Jobber Length Cobalt Drill Bit

Irwin 63120
SKU IRW-63120
Irwin 5/16" Jobber Length Cobalt Drill Bit

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This jobber length cobalt drill bit has been specifically engineered for drilling through hard metals and steel, including stainless steel. Made of industrial-strength cobalt, this bit features a 135 degree split point for enhanced hole drilling, including quick starts and clean, burr-free holes.

  • Cutting Diameter: 5/16 in.
  • Flute Length: 3 3/16 in.
  • Overall Length: 2 13/16 in.
  • Applicable Materials: Hard Steel, Stainless Steel, Titanium.
  • Cutting Edge Material: HSS-E (Co-M42).
  • Finish: Gold Oxide.
  • Length Group: Jobber.
  • Packing Type: Bulk.
  • Point Angle: 135 degree.
  • Point Shape: Split.
  • Shank Type: Cylinder.
  • Spiral Angle: CW.
  • Structure: Solid.
  • Type: Drill Bit.

Similar Drill Bit Products

Irwin 63120 Description

This jobber length cobalt drill bit has been specifically engineered for drilling through hard metals and steel, including stainless steel. Made of industrial-strength cobalt, this bit features a 135 degree split point for enhanced hole drilling, including quick starts and clean, burr-free holes.

  • Cutting Diameter: 5/16 in.
  • Flute Length: 3 3/16 in.
  • Overall Length: 2 13/16 in.
  • Applicable Materials: Hard Steel, Stainless Steel, Titanium.
  • Cutting Edge Material: HSS-E (Co-M42).
  • Finish: Gold Oxide.
  • Length Group: Jobber.
  • Packing Type: Bulk.
  • Point Angle: 135 degree.
  • Point Shape: Split.
  • Shank Type: Cylinder.
  • Spiral Angle: CW.
  • Structure: Solid.
  • Type: Drill Bit.

Similar Drill Bit Products

$5.62Bit
In Stock-

Ships between 02/23/2026 - 02/25/2026

Irwin
Visit The Irwin Store
See more Irwin Vise-Grip Cobalt Steel Drills

Product Specifications

Part Number63120, 585-63120
Weight0.09-lb
UPC042526631205

Shop Top 100 Tools & Hardware Products.

View other Drill Bit Best Sellers.

Manufacturer Description

5/16" Cobalt Drill Bit

  • 8% Cobalt for higher heat and abrasion resistance. Heavy-duty web construction for strength and durability. 135 split point begins drilling immediately minimizing bit "walk"
  • Applicable Materials: Hard Steel Stainless Steel Titanium
  • Cutting Diam: 5/16 in
  • Finish: Gold Oxide
  • Packing Type: Bulk
  • Type: Drill Bit
  • Weight: 0.08 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 5/16" Jobber Length Cobalt Drill Bit
$5.62Bit
In Stock-

Ships between 02/23/2026 - 02/25/2026

Similar Drill Bit Products

Irwin 63120 Description

This jobber length cobalt drill bit has been specifically engineered for drilling through hard metals and steel, including stainless steel. Made of industrial-strength cobalt, this bit features a 135 degree split point for enhanced hole drilling, including quick starts and clean, burr-free holes.

  • Cutting Diameter: 5/16 in.
  • Flute Length: 3 3/16 in.
  • Overall Length: 2 13/16 in.
  • Applicable Materials: Hard Steel, Stainless Steel, Titanium.
  • Cutting Edge Material: HSS-E (Co-M42).
  • Finish: Gold Oxide.
  • Length Group: Jobber.
  • Packing Type: Bulk.
  • Point Angle: 135 degree.
  • Point Shape: Split.
  • Shank Type: Cylinder.
  • Spiral Angle: CW.
  • Structure: Solid.
  • Type: Drill Bit.

Product Specifications

Irwin
Visit The Irwin Store
Part Number63120, 585-63120
Weight0.09-lb
UPC042526631205

Shop Top 100 Tools & Hardware Products.

View other Drill Bit Best Sellers.

Manufacturer Description

5/16" Cobalt Drill Bit

  • 8% Cobalt for higher heat and abrasion resistance. Heavy-duty web construction for strength and durability. 135 split point begins drilling immediately minimizing bit "walk"
  • Applicable Materials: Hard Steel Stainless Steel Titanium
  • Cutting Diam: 5/16 in
  • Finish: Gold Oxide
  • Packing Type: Bulk
  • Type: Drill Bit
  • Weight: 0.08 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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