MACXCOIP 115-Piece Cobalt Drill Bit Set | M35 HSS for Hardened Metals

Meet the MACXCOIP 115-piece cobalt drill bit set, a comprehensive kit designed to cover a broad range of drilling tasks in one place. Built to handle tough materials and everyday projects alike, this collection combines size variety with durable, sharp tooling.

What makes this set stand out is the combination of M35 cobalt alloy and high-speed steel construction, engineered to resist wear and maintain a clean edge through stainless steel, cast iron, copper, aluminum, and more. Each bit is hardened and polished to help you achieve precise holes with less wandering.

Versatile sizes for many materials

The kit includes 29 fractional bits from 1/16" to 1/2" in 1/64" steps, 26 letter bits A through Z, and 60 numbered bits #1 through #60. With this range, you can select the right size without hunting through multiple sets.

• Fractional, letter, and numbered bits cover an extensive range of drilling needs.
• Self-centering design helps keep the bit on target during setup.

Designed for speed, control, and long-term use

The 135-degree point tip and twist geometry promote fast cutting and cleaner entry. The self-centering feature reduces walk-off, while polished inserts improve sharpness and consistency over many holes.

• 135° point tips for quicker penetration and smoother chip flow.
• Hardened, polished inserts sustain sharpness for repeated use on hard materials.

Organization you can rely on

All bits come in a metal index storage box with labeled size indexes, so you can sort and retrieve efficiently. The compact packaging keeps your workbench tidy and ready for action.

• Durable storage box + labeled holders for quick reference.
• Compact, protective packaging for safe transport.

Practical benefits for real-world projects

Whether you’re upgrading metal parts, assembling tools, or tackling hobby projects, this set offers flexibility and reliability. Benefits are described as possibilities, dependent on proper technique and material conditions.

What you may notice in daily use

During drilling you may see clean chip formation, reduced heat buildup, and consistent hole sizing due to the alloy and coating. The organized metal case helps you stay productive, especially on busy days with multiple tasks.

• Clean cutting action and steady performance across metals, wood, and plastics.
• Organized storage supports faster setup and fewer misplacements.