Eagle Cutting Tool S304-104-I Cobalt Jobber Drill Bit

Product Description

The EAGLE CUTTING TOOL S304-104-I is a size 4 cobalt jobber-length drill bit suited for demanding metal drilling applications. Cobalt construction provides elevated heat resistance compared to standard high-speed steel, allowing it to maintain a sharp cutting edge when working through hard or abrasive materials such as stainless steel, cast iron, and hardened alloys. This drill bit is used by electricians, plumbers, pipefitters, HVAC technicians, and general tradespeople who need a reliable bit for through-hole work in metal panels, brackets, and structural components. The jobber-length geometry offers a balance of reach and rigidity for most standard drilling tasks.

This bit is appropriate for use in hand-held drills and drill presses across residential and light commercial job sites. It is well suited for trade professionals who routinely drill into ferrous metals, sheet metal, and similar materials where a standard HSS bit would dull prematurely. The size 4 designation fits within the number drill series, making it a common choice for tapping prep and precision hole sizing in metal fabrication and service work.

Key Features

• Cobalt construction for improved heat and wear resistance over standard HSS bits
• Jobber-length design balances reach with torsional rigidity
• Size 4 number drill for precision hole sizing and tap preparation
• Suitable for drilling hard and abrasive metals including stainless steel and cast iron
• Minimum order quantity of 1 unit

Compatibility

Designed as a standard number-series jobber drill bit compatible with conventional 3-jaw drill chucks on hand drills and drill presses that accept the corresponding shank size.

Installation Notes

Secure the workpiece firmly before drilling to prevent movement and bit breakage. Use appropriate cutting fluid or lubricant when drilling hard metals to extend bit life and reduce heat buildup. Always wear eye protection when operating drill bits. Follow applicable workplace safety standards and tool manufacturer guidelines when operating drilling equipment.

Technical Specifications

• Drill Size: 4 (number drill series)
• Drill Type: Jobber Length
• Material: Cobalt
• Weight: 0.4 pounds
• Minimum Order Quantity: 1

Standard Information

• Brand: EAGLE CUTTING TOOL
• Manufacturer Part Number: S304-104-I