Precision Twist Drill 5995524 Cobalt Drill Bit Set 15 Pc

Product Description

The PRECISION TWIST DRILL 5995524 is a 15-piece cobalt jobber length drill bit set designed for heavy-duty metalworking and multipurpose drilling applications. Each bit is manufactured from cobalt tool steel with a gold finish and features a 135-degree split-point tip for accurate starting without a center punch. The straight shank design is compatible with standard drill chucks. This set covers sizes from 1/16 inch to 1/2 inch in 1/32-inch step increments, giving technicians and tradespeople a complete range for common hole sizes in a single case. The set meets ANSI and NAS 907 specification designations.

This drill bit set is suited for metalworking environments where hard or abrasive materials demand a more durable tool steel than standard high-speed steel bits. Typical applications include drilling into steel plate, structural members, stainless, and other ferrous and non-ferrous metals. The jobber length geometry balances rigidity and reach for general-purpose work at the drill press or with a handheld drill. The included plastic storage case keeps bits organized and protected on the job site or in the shop. This set is a practical choice for HVAC, plumbing, electrical, and general mechanical trades where frequent metal drilling is part of the workflow.

Key Features

• Cobalt tool steel construction for extended life in hard and abrasive metals
• 135-degree split-point tip reduces walking and improves hole accuracy
• Gold finish for visual identification and added surface protection
• Straight shank fits standard drill chucks without an adapter
• 15-piece set covers 1/16 inch to 1/2 inch in 1/32-inch increments
• Plastic storage case included for organized transport and storage

Compatibility

Designed as an OEM-style replacement and general-purpose fit for standard straight-shank drill chucks used in handheld drills and bench drill presses across metalworking and trade applications.

Installation Notes

Installation is performed by machinists, maintenance technicians, and trade professionals using standard keyed or keyless drill chucks. Secure the straight shank firmly in the chuck before operation and confirm the workpiece is clamped or secured. Use appropriate cutting fluid or lubricant when drilling hard metals to extend bit life and reduce heat buildup. Follow applicable shop safety and PPE requirements when operating drilling equipment.