Cobalt Drill Bit Set 29Pcs M35 HSS - Durable Metal and Wood Bits

In this review the Cobalt Drill Bit Set 29Pcs M35 HSS is evaluated for hobbyists and tradespeople who need a single compact set that covers a wide size range. The bottom line: this kit is best for users who drill a mix of materials from stainless steel to wood because the M35 cobalt composition and 135 degree point offer improved cutting in hardened metals while the included metal index box keeps bits organized. It is not a specialty set for only masonry or very high production manufacturing, but it is a practical, versatile option for home shops and light industrial use.

Key Features

• Comprehensive size range: The 29-piece selection from 1/16' to 1/2' covers common fractional sizes so you rarely need another bit for typical projects.
• M35 cobalt construction: The cobalt alloy provides durability and heat resistance, making it suitable for stainless steel, iron castings, copper and aluminum as well as softer materials.
• 135 degree point: The split-style tip helps with self-centering to reduce walk-off and makes it easier to start holes in metal without pilot marks.
• Jobber length HSS design: The jobber length profile balances rigidity and reach for general drilling tasks while maintaining cutting performance.
• Polished, hardened finish: Hardened and polished flutes improve sharpness and chip evacuation for cleaner drilling and reduced wobble.
• Metal index storage box: A compact, indexed metal case keeps all 29 bits sorted and easy to transport for jobsite or workshop use.

Who It's For

This set is aimed at DIYers, mechanics and metalworkers who need a single, versatile kit that handles a variety of materials. Someone who works on occasional stainless steel repairs, automotive brackets or home metal projects will appreciate the M35 cobalt composition and the wide fractional sizing.

It is less appropriate for users who need carbide or masonry bits, or for high-volume industrial drilling where specialized coated production bits or reaming tools would perform longer. If you only cut wood or only cut thin sheet metal, a dedicated set optimized for that material might be a better fit.

Pros & Cons

Pros

• Wide selection of fractional sizes in one compact kit for fewer trips to the toolbox.
• M35 cobalt and 135 degree points make drilling harder metals more practical than standard HSS bits.
• Metal index storage box keeps bits protected and sorted for quick selection and transport.
• Hardened, polished flutes help with smoother cuts and chip removal.

Cons

• Some users report mixed results on durability; performance can vary with heavy industrial use or improper feed and speed.
• Not a replacement for carbide masonry bits or specialty production tooling for high-volume jobs.

Specifications

Brand	MACXCOIP
Material	M35 cobalt high speed steel
Sizes included	29 pieces: 1/16' to 1/2' fractional set
Point angle	135 degree
Length type	Jobber length
Storage	Metal index storage box with size indexes

Our Verdict

The Cobalt Drill Bit Set 29Pcs M35 HSS is a great value for home shops and light trade use because it combines an extensive fractional size range, M35 cobalt durability and a convenient metal index box. Buyers who need versatility across stainless steel, cast iron and common metals will find it reliable for occasional to moderate workloads, while heavy production users should consider more specialized tooling.

Frequently Asked Questions

Can these bits drill stainless steel?
Yes, the M35 cobalt composition and 135 degree point make them suitable for drilling stainless steel and other hardened metals when used with proper speed and cooling.

What sizes are included?
The kit includes 29 fractional sizes ranging from 1/16' up to 1/2' to cover common drilling needs.

How are the bits stored?
The bits are supplied in a compact metal index storage box with size labels for neat sorting and transport.