TEMO M35 3pc Step Drill Bit Set 6/9/13 Step - M35 Cobalt

In this review of the TEMO 3 pc M35 cobalt step drill set the bottom line is simple: this kit is for tradespeople and hobbyists who need a compact set of durable step bits that cut through metal, including stainless steel, with speed and lasting sharpness. The set's single biggest reason to buy is the M35 HSSCo construction combined with double straight flutes, which delivers fast, consistent cutting and the ability to enlarge existing holes without frequent bit changes.

Key Features

• M35 HSSCo construction: The 5% cobalt high speed steel alloy gives the bits higher heat resistance and edge life for repeated use on stainless and mild steel.
• Three useful sizes in one kit: The 6-, 9- and 13-step bits cover a broad range of diameters so you can drill or enlarge holes from 1/8 in to 3/4 in without changing tools.
• Double straight flutes: Flute geometry helps clear chips quickly and maintain cutting speed when working through metal, plastic, fiberglass or wood.
• Step increments marked by size: Each step corresponds to a standard diameter for repeatable hole sizes and easier control while enlarging holes.
• Versatile material use: Rated for stainless steel, mild steel, plastic and wood, making the set suitable for electrical work, sheet metal and general workshop tasks.

Who It's For

This set is aimed at mechanics, sheet metal workers, electricians and DIYers who frequently need a compact selection of hole sizes and want the durability of M35 cobalt. The 13-step bit is especially handy for precise, small-diameter work while the 9-step and 6-step bits cover larger openings up to 3/4 in.

Those who should look elsewhere include users who require metric-only step sizes, extremely high-volume production shops that prefer carbide tooling for maximum life, or anyone needing drilling under very high RPMs without coolant where a specialty coating might be preferred.

Pros & Cons

Pros

• Excellent cutting speed and sharpness on mild and stainless steel thanks to the M35 alloy.
• Broad size coverage from 1/8 in to 3/4 in across three bits reduces tool changes on the job.
• Durable edge retention reported by users even after dozens of holes, making this a good value purchase.
• Double straight flutes help eject chips and keep drilling efficient in various materials.

Cons

• Step drill bits are not ideal for users who need strictly metric sizing or extremely fine fractional increments.
• Without a specialty coating, users should use proper speed and lubrication for maximum life on thicker stainless steel.

Specifications

Set composition	3 pc step drill bit set (6, 9, 13 steps)
Material	M35 HSSCo (5% cobalt)
6-step sizes	3/16 in, 1/4 in, 5/16 in, 3/8 in, 7/16 in, 1/2 in
9-step sizes	1/4 in to 3/4 in in nine steps (increments through 3/4 in)
13-step sizes	1/8 in to 1/2 in in thirteen steps
Flute type	Double straight flutes
Customer support	US-based service center in La Crosse, WI

Our Verdict

The TEMO 3 pc M35 step drill set is a practical, value-minded choice for professionals and serious DIY users who need reliable performance across a wide range of hole sizes. Its M35 construction and flute design make it especially capable on stainless and mild steel, and the three-bit format keeps jobs moving with fewer tool swaps. For general metalworking and multi-material projects this set offers solid durability and fast cutting at a sensible price.

Frequently Asked Questions

Can these bits cut stainless steel?
Yes. The M35 cobalt alloy and straight flutes are designed to cut stainless and mild steel when used at appropriate speeds with lubrication.

Do the bits cover metric sizes?
The set lists fractional inch sizes only; metric equivalents can be inferred but the bits are labeled and intended for inch-size use.

Is this set suitable for enlarging existing holes?
Yes. Step drill bits are well suited for enlarging holes and the incremental steps let you expand openings precisely without swapping bits.