M35 Cobalt Drill Bits 1/16in-1/2in 29pc Jobber Set - Durable Precision

In this review of the Luckyway M35 cobalt drill bit set, the bottom line is simple: this 29-piece jobber length collection is aimed at DIYers and metalworkers who need durable, sharp bits that handle hard metals without frequent replacement. The set stands out because the bits are made from M35 high speed steel with 5% cobalt, which gives them a longer life drilling stainless steel, cast iron and other tough materials. The included plastic storage case keeps sizes organized and portable, making it a practical workshop staple.

Key Features

• Range of sizes: The 29-piece selection from 1/16in to 1/2in covers common drilling needs so users rarely need an additional bit for routine metal and wood work.
• M35 material: Made from high speed steel with 5% cobalt for improved hardness and heat resistance, extending bit life when drilling hard metals.
• 135 double rear edge angle: The standard 135 angle provides self-centering performance to reduce walk-off and improve hole accuracy on stubborn materials.
• Double spiral flute: The twin-spiral cutting slots enhance chip evacuation and cutting efficiency, particularly when working through metal.
• Tri-flatted shank: The 3-flats shank design reduces spin-out in the chuck and locks securely in 3-jaw chucks, limiting slippage during use.
• Durable finish: Smooth surface and high grinding precision on each bit contribute to consistent sharpness and predictable cutting behavior.

Who It's For

This set is best for home mechanics, metal fabricators, and dedicated DIYers who regularly drill into stainless steel, cast iron, aluminum, copper, and also need versatility for wood and plastic. The M35 composition makes it suited for projects that generate heat and require sustained cutting performance without frequent bit changes.

Users who prioritize a single high-quality set over occasional specialty bits will appreciate the 29-size spread and jobber length. Those who require cobalt levels higher than 5% for extreme industrial applications or precision specialty bits for masonry should look for higher-spec or specialized tooling instead.

Pros & Cons

Pros

• High durability from M35 material, offering better wear resistance than standard HSS.
• Comprehensive size range 1/16in to 1/2in covers most workshop tasks.
• Tri-flatted shank reduces slippage, improving control and safety in drills and drill presses.
• Plastic storage case keeps the set organized and portable for jobsite use.

Cons

• Some customers report occasional missing bits in packaging, so inspect the case on arrival.
• Plastic case is convenient but not as protective as a metal case for heavy-duty transport.

Specifications

Brand	Luckyway
Material	M35 high speed steel with 5% cobalt
Set size	29 pieces
Size range	1/16in to 1/2in
Length	Jobber length
Shank design	Tri-flatted shank (3-flats)
Included storage	Durable plastic case

Our Verdict

The Luckyway M35 29-piece jobber set is a reliable, value-minded choice for those who drill metal regularly and want a durable upgrade from standard HSS bits. With a useful range of sizes, cobalt alloy construction, and anti-slip shank design, it delivers consistent performance for workshop and jobsite tasks, though buyers should verify the case contents on arrival.

Frequently Asked Questions

Are these bits suitable for stainless steel?
Yes. The M35 composition with 5% cobalt is intended for drilling stainless steel and other hard metals while offering better heat resistance than standard HSS.

Will the bits fit a standard drill press?
Yes. These are jobber length bits with a tri-flatted shank that fits most drill presses and 3-jaw chucks without excessive slippage.

Is the storage case durable enough for jobsite use?
The included plastic case is convenient for organization and transport; it is practical for typical use but not as impact resistant as metal cases for rough handling.