Precision Twist Drill 5996335 R15CO 15-Piece Cobalt Drill Bit Set

The Precision Twist Drill R15CO (MPN: 5996335) is a 15-piece cobalt drill bit set engineered for professionals and serious DIYers who need reliable performance when drilling through tough materials. Manufactured by Precision Twist Drill — a trusted name in American cutting tool manufacturing since 1882 — this set delivers the durability and precision demanded by industrial and trade applications.

Key Features:

• Cobalt construction: M42 cobalt high-speed steel composition provides superior heat and wear resistance compared to standard HSS bits
• 15-piece set: Covers a comprehensive range of common drill bit sizes for versatile job-site use
• 135° split point tip: Self-centering design reduces walking and enables faster penetration with less pressure
• Jobber length: Standard jobber-length geometry balances rigidity with reach for general-purpose drilling
• Designed for hard materials: Ideal for stainless steel, cast iron, titanium alloys, and other hardened metals
• Bronze oxide finish: Helps reduce friction and extend bit life during use

The Precision Twist Drill 5996335 set is made in the USA and backed by PTD's long-standing commitment to quality and dimensional accuracy. Whether used in production environments or maintenance and repair operations, this cobalt set provides consistent results and extended tool life.