Irwin 67520 5/16 in Black Oxide Jobber Drill Bit 5-pack

Product Description

The IRWIN INDUSTRIAL TOOL CO 67520 is a 5/16-inch jobber length drill bit constructed from M-2 high speed steel (HSS) with a black oxide coating. M-2 HSS delivers a strong balance of heat resistance, wear resistance, and toughness for demanding general-purpose drilling applications. The black oxide surface treatment reduces corrosion and extends service life. A 135-degree split point geometry ensures the bit seats on contact without walking across the workpiece, eliminating the need for a center punch in most applications. Sold in a 5-pack, this SKU is well suited for shop stock, service van kits, or any application where consistent, repeatable hole quality is required.

The 67520 is designed for general drilling in wood, metal, and plastic. The jobber length format provides a practical balance of reach and rigidity, making it appropriate for drill presses, hand drills, and impact-rated drill/drivers in both shop and field settings. Residential and commercial tradespeople, general contractors, HVAC technicians, plumbers, and electricians regularly carry 5/16-inch jobber bits for fastener clearance holes, conduit knockout prep, and general fabrication tasks.

Key Features

• M-2 high speed steel construction for heat resistance, wear resistance, and strength
• Black oxide coating reduces corrosion and extends bit service life
• 135-degree split point starts on contact and prevents bit walking
• Jobber length format balances reach and rigidity for general-purpose use
• Compatible with standard drill chucks accepting 5/16-inch shank bits
• 5-pack quantity supports shop restocking and service kit organization

Compatibility

Designed as a general-purpose jobber length drill bit suitable for use in standard 3-jaw drill chucks on bench drill presses, cordless drill/drivers, and corded electric drills accepting a 5/16-inch shank.

Installation Notes

Secure the bit fully in the chuck before drilling and verify chuck key is removed before powering the tool. When drilling metal, use appropriate cutting fluid or lubricant to extend bit life and manage heat buildup. Drilling should be performed by qualified tradespeople following applicable workplace safety codes and tool manufacturer guidelines. Inspect bits for wear or damage before each use and replace bits that show chipping, heat discoloration, or dimensional wear.