Eagle Cutting Tool C304-157-D Cobalt Jobber Drill No. 57

Product Description

The EAGLE CUTTING TOOL C304-157-D is a No. 57 wire gauge cobalt jobber drill manufactured in the USA. Cobalt construction gives this drill superior heat resistance and edge retention compared to standard high-speed steel, making it well suited for drilling through hard or abrasive materials. At 0.12 pounds, it is a lightweight, single-piece cutting tool designed for use in standard drill chucks. Licensed tradespeople and machinists rely on jobber-length drills like this one for general-purpose hole drilling across a wide range of materials and workpiece sizes.

This drill is used in residential, commercial, and industrial trade work where precision small-diameter hole drilling is required. Typical applications include drilling pilot holes in stainless steel, cast iron, hard alloys, and other tough metals that would quickly degrade conventional high-speed steel bits. HVAC technicians, plumbers, electricians, and sheet metal workers reach for cobalt drills when working with harder stock or when drill life on the job site is a priority.

Key Features

• No. 57 wire gauge diameter for small, precise hole sizing
• Cobalt construction for increased heat resistance and extended tool life in hard materials
• Jobber length provides standard reach suitable for most benchtop and handheld drill applications
• USA manufactured
• Minimum order quantity of 1 — available as a single unit

Compatibility

Designed as a standard wire gauge jobber drill compatible with any drill press, handheld drill, or drill driver equipped with a chuck sized to accept No. 57 wire gauge shank diameter.

Installation Notes

Installation of this drill bit is performed by machinists, maintenance technicians, or licensed tradespeople using a standard keyed or keyless chuck. Secure the shank fully in the chuck before operation and verify the bit runs true before cutting. Use appropriate cutting fluid or cooling when drilling hard metals to preserve edge life. Always wear eye protection and follow applicable workplace safety standards when operating rotary cutting tools.

Technical Specifications

• Drill Size: No. 57 wire gauge
• Drill Type: Cobalt Jobber
• Country of Origin: USA
• Weight: 0.12 pounds

Standard Information

• Brand: EAGLE CUTTING TOOL
• Manufacturer Part Number: C304-157-D