EZARC M35 Cobalt Step Drill Bit Set, 3-Piece, 1/8–7/8 in., 1/4 in. Hex Shank

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Product guide

EZARC M35 Cobalt Step Drill Bit Set, 3-Piece, 1/8–7/8 in., 1/4 in. Hex Shank

The EZARC M35 Cobalt Step Drill Bit Set is a three-piece stepped-bit kit listed for hole sizes from 1/8 to 7/8 inch, with a 1/4-inch hex shank. Its listed M35 cobalt steel and AlTiN coating are aimed at sheet-metal work, but the manufacturer specifies thickness limits and recommends lubricant during continuous use.

At a glance

Three step drill bits are listed for a 1/8–7/8-inch size range and organized in a compact case, according to the listing.
M35 cobalt high-speed steel and AlTiN coating are manufacturer claims. The listing also describes triple spiral flutes and a C-profile cutting edge.
The maker specifies metal sheet up to 1/8 inch (3 mm) and stainless steel sheet up to 1 mm thick.
For continuous operation, the maker recommends cutting oil or coolant and cautions that startup speed may be slower.

Price

$53.97Save 10%

Reference price: ~~$59.97~~

Price checked: Nov 13, 2026

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Often bought together

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toolant M35 Cobalt Step Drill Bit, 1/4"-3/4", TiAlN, 1/4" Hex Shank | M35 Cobalt HSS; TiAlN Coating; Four Spiral Flutes; 1/4" Hex Shank Unibit; Metal/Stainless/Aluminum/Plastic

$22.99

Pros and cons

Pros

Three bits and a stepped design cover a listed range of hole sizes without requiring a separate bit for each step.
A 1/4-inch hex shank and spiral flutes are specified for the set.
The manufacturer identifies material thickness limits and recommends lubrication, providing useful operating boundaries.

Cons

The stated capacity is limited to metal sheet up to 1/8 inch and stainless steel sheet up to 1 mm, which may rule out thicker stock.

Technical specifications

9 specifications

Identity
Brand	EZARC
Part number	80379001

Materials and finish
Material listed	Cobalt Steel
Finish listed	Titanium Nitride

Shank and cutting
Shank type	1/4" Hex Shank
Cutting diameter	0.75 inches
Flute type	Spiral
Number of flutes	3

Listed applications
Surface recommendation	Metal, Plastic, Stainless Steel, Wood

What to know before buying

The listing identifies the finish as both Titanium Nitride and AlTiN, and says both triple-and-spiral flute and spiral flute. It also lists a 0.75-inch cutting diameter alongside a 1/8–7/8-inch set range and a 0.75-inch minimum bore diameter. Confirm the size progression and coating description for the selected listing. Use lubricant or coolant for continuous operation, and observe the stated material-thickness limits.

What’s in the box

Storage caseCheck selected pack

Check which accessories are included in your selected pack before buying.

Who is it for?

A good fit for

DIYers and tradespeople drilling stepped holes in thin metal or stainless-steel sheet within the stated thickness limits.
Buyers seeking a compact three-bit set with a 1/4-inch hex shank for metal, plastic, or other listed surfaces.

Less suited to

Anyone needing to drill metal sheet thicker than 1/8 inch or stainless steel thicker than 1 mm, based on the stated limits.
Buyers who require confirmed performance in an impact drill. Customer feedback includes a report of difficulty using one that way.

EZARC M35 Cobalt Step Drill Bit Set, 3-Piece, 1/8–7/8 in., 1/4 in. Hex Shank · photo 2 — Additional product photo 2

Customer reviews on Amazon

4.3 / 5 · 426 ratings

5 stars69%69%
4 stars12%12%
3 stars8%8%
2 stars1%1%
1 star10%10%

Customer feedback praises sharpness and cutting performance, including a report of cutting 1/2-inch mild steel, but other customers report bits breaking within a week. Comments also differ on value, and one customer reports difficulty using the bits with an impact drill. Those experiences matter because the listing itself limits sheet thickness and calls for lubricant during continuous work. They are customer reports, not confirmation of performance or durability across uses.

Positive themes

Customers describe the bits as sharp and report good cutting performance.

Negative themes

Some customers report bits breaking within a week of use.

Mixed feedback

Customers differ on value, and feedback on drilling capacity includes a report of difficulty using the bits with an impact drill.

Frequently asked questions

What material thickness does the manufacturer specify?

The listing says the bits are suitable for metal sheet up to 1/8 inch (3 mm) and stainless steel sheet up to 1 mm thick.

Does the listing specify a coating?

It gives inconsistent coating names: Titanium Nitride in the details and AlTiN in the feature text. Confirm the coating description on the selected listing if it matters to your purchase.

Should I use lubricant while drilling?

The manufacturer recommends adding cutting oil or coolant before continuous operation. Its instructions also suggest low speed and light pressure.

Is the included case confirmed?

A compact storage case is claimed in the feature text, but the supplied package information does not provide an explicit contents list.