Irwin 63920 639 Series TiN-Coated Jobber Length Drill Bit, 135° Split Point

Irwin 639 Series TiN-Coated Jobber Length Drill Bit, 135° Split Point

The Irwin 639 Series TiN-Coated Jobber Length Drill Bit brings a Titanium Nitride (TiN) coating and heavy-duty web design to demanding metal drilling applications, with a 135° split point that reduces feed pressure for easier penetration without work hardening. Offered across multiple sizes in the 639 Series lineup, including the 5/16" Model 63920, this jobber-length bit delivers extreme rigidity and up to six times longer tool life than standard high speed steel drill bits. Shorter cutting lips reduce torque when working in high tensile strength materials, and each bit is packaged individually on a card for easy retail display, making the 639 Series a dependable choice for metalworking and fabrication tasks where durability and precision matter most.

Key Features

• Titanium Nitride Coating: extends bit life up to six times longer than standard high speed steel drill bits.
• Heavy-Duty Web Design: provides extreme rigidity when drilling in metal applications.
• 135° Split Point: reduces feed pressure for easier penetration without work hardening.
• Shorter Cutting Lips: reduce torque when drilling in high tensile strength materials.
• Jobber Length Configuration: sized for precision holes in metal, available across the 639 Series including the 5/16" Model 63920.
• Individual Bit: sold individually rather than as part of a set.
• Individual Packaging: carded for retail display and easy identification.

Technical Specifications

• Warranty: NLW
• Claims Needed: No
• Country of Origin: CHN
• Battery Included: No

Typical Applications

• Drilling Holes in Metal and Steel Materials
• Precision Hole Drilling in Metal Components
• Metalworking and Fabrication Projects
• High Tensile Strength Material Drilling
• Professional and DIY Workshop Use

Why Irwin?

Irwin engineers the 639 Series drill bit with a Titanium Nitride coating and heavy-duty web design to deliver long-lasting performance and extreme rigidity for metal drilling. The 135° split point ensures easier penetration without work hardening, while shorter cutting lips help reduce torque in high tensile strength materials. Available across multiple sizes in the 639 Series, including the 5/16" Model 63920, these construction details make the line a dependable choice for professional tradespeople and DIY users tackling metalworking and fabrication projects that demand precision and durability. Whether you need the 5/16" Model 63920 or another size within the 639 Series, Irwin's consistent construction standards deliver reliable results project after project.