Drill America DWD29J-CO-PC 29-Piece M35 Cobalt Drill Bit Set in Round Case – DWDCO Series (1/16" to 1/2" x 64ths)

Overview

The Drill America DWD29J-CO-PC 29-piece M35 cobalt drill bit set is built for challenging materials and demanding projects. With high heat resistance and elevated red hardness compared to standard high-speed steel, these bits are designed to perform when the going gets tough. Manufactured to Aerospace Standard 907, the kit emphasizes precision and reliability, making it a practical choice for professional work and serious DIY tasks alike.

When drilling tough metals like stainless steel, Inconel, or titanium, you may notice the cobalt alloy maintaining cutting performance under heat, helping you sustain momentum and reduce blade wear. A 135-degree split-point tip is self-centering, improving starting accuracy and minimizing drift, which is especially helpful in edge work or difficult hole locations.

Key Benefits

• M35 cobalt composition provides enhanced heat resistance and red hardness for longer tool life and steadier cuts on hard materials.
• 135-degree split-point design promotes self-centering entry, reduces walking, and helps you start holes cleanly.
• Gold oxide finish adds lubricity and wear resistance, supporting smoother drilling and reduced friction during use.
• Set meets ANSI specifications and aligns with aerospace industry standards for reliable, professional-grade performance.

Durable case and portability

• The 29 bits are housed in a round plastic case that is rust-resistant, waterproof, and shatter-proof, helping protect the bits on site or in transit.
• Compact, lightweight packaging makes it easy to organize by project or crew, reducing search time on the job.

What's included and size range

This comprehensive kit spans 29 sizes from 1/16" to 1/2" in 1/64" increments, offering broad coverage for a variety of drilling tasks. It’s a versatile addition to a workshop, contractor toolkit, or manufacturing setting.

Usage notes

For best results, pair with appropriate feeds and speed settings for the material you’re drilling, and consider pilot-hole strategies when working with very hard alloys. The cobalt bits are designed to sustain cutting efficiency with hard metals while providing a consistent hole quality where it matters.