Eagle Cutting Tool C304-156-D Cobalt Jobber Drill No. 56

Product Description

The EAGLE CUTTING TOOL C304-156-D is a No. 56 cobalt jobber-length drill bit manufactured in the USA. Cobalt construction provides superior heat resistance and edge retention compared to standard high-speed steel, making this bit well suited for drilling hard and abrasive materials including stainless steel, cast iron, and hardened alloys. The jobber-length geometry delivers a versatile reach-to-diameter ratio appropriate for general-purpose drilling across a wide range of trade and shop applications. This bit is intended for use by experienced tradespeople, machinists, and service technicians working with ferrous and non-ferrous metals.

The C304-156-D is used in residential, commercial, and light industrial settings wherever a wire-gauge No. 56 hole diameter is required. Typical applications include electrical panel work, plumbing rough-in, HVAC sheet metal fabrication, and mechanical assembly. Its cobalt composition makes it a reliable choice when drilling into harder base materials that would prematurely dull conventional twist drills. The USA origin indicates domestic manufacturing to standard jobber-drill tolerances.

Key Features

• Cobalt construction for enhanced heat resistance and longer tool life in hard materials
• No. 56 wire-gauge diameter for precision hole sizing in trade and fabrication work
• Jobber-length design provides versatile reach suitable for most standard drilling tasks
• USA manufactured to jobber-drill dimensional standards
• Minimum order quantity of 1 — available as a single unit

Compatibility

Designed as a standard jobber-length twist drill compatible with any keyed or keyless drill chuck accepting the corresponding shank diameter for a No. 56 wire-gauge bit.

Installation Notes

This drill bit is installed and operated by machinists, HVAC technicians, electricians, and plumbers using standard corded or cordless drill drivers and drill presses. Always secure the workpiece before drilling and use appropriate cutting fluid when drilling hard ferrous metals to extend bit life and reduce heat buildup. Inspect the cutting edges before each use and replace the bit if chipping or dulling is observed to avoid workpiece damage or bit failure.

Technical Specifications

• Drill Size: No. 56 (wire gauge)
• Material: Cobalt
• Length Style: Jobber
• Country of Origin: USA
• Weight: 0.12 pounds

Standard Information

• Brand: EAGLE CUTTING TOOL
• Manufacturer Part Number: C304-156-D