Milwaukee 48-89-2315 Cobalt Drill Bit 9/32 in 3-pack

Product Description

The Milwaukee Electric Tool Corp 48-89-2315 is a cobalt drill bit designed for professionals who need consistent performance in hard metals and demanding materials. Sold as a 3-pack, this 9/32-inch diameter bit features Milwaukee's RED HELIX geometry, which is engineered to maximize speed and reduce heat buildup during drilling. Cobalt construction provides greater hardness and heat resistance compared to standard high-speed steel bits, making these well-suited for drilling into stainless steel, cast iron, hard alloys, and similar materials encountered in mechanical, plumbing, and electrical rough-in work. Each bit weighs approximately 0.07 pounds.

This bit is a practical addition to any trade toolkit where repeated drilling into hard substrates is required. The 9/32-inch size is commonly used for fastener clearance holes, conduit knock-outs, and bracket mounting applications across HVAC, plumbing, and electrical installations. The 3-pack format is suited for crews and service vans where bit replacement is a regular maintenance item.

Key Features

• Cobalt construction for superior hardness and heat resistance in hard metals
• RED HELIX flute geometry promotes faster chip evacuation and reduced heat
• 9/32-inch diameter suits common fastener and clearance hole applications
• Sold as a 3-pack for extended jobsite availability
• Suitable for stainless steel, cast iron, hard alloys, and similar tough materials

Compatibility

Designed as a standard round-shank cobalt drill bit compatible with any 3/8-inch or 1/2-inch keyed or keyless drill chuck accepting straight-shank bits.

Installation Notes

Cobalt drill bits are installed and used by electricians, plumbers, HVAC technicians, and general tradespeople. Always secure the workpiece before drilling and use appropriate cutting fluid or lubricant when drilling hard metals to extend bit life. Wear proper eye protection in accordance with applicable jobsite safety requirements. Inspect each bit for wear or damage before use and replace if the cutting edges show visible dulling or chipping.

Technical Specifications

• Diameter: 9/32 inches
• Bit Material: Cobalt
• Package Quantity: 3 pieces
• Unit of Measure: EA
• Weight: 0.21 pounds (per package)

Standard Information

• Brand: Milwaukee Electric Tool Corp
• Manufacturer Part Number: 48-89-2315