ZELCAN 19-Size M35 Cobalt Step Drill Bit 3/16 in to 1-3/8 in - Smooth

Our review finds the ZELCAN 19 Sizes M35 Cobalt Step Drill Bit is aimed at DIYers and tradespeople who need one compact bit to handle a wide range of hole sizes in sheet materials. In this review the biggest reason to buy is versatility: a single titanium-coated HSS step bit covers 19 common sizes from 3/16 in to 1-3/8 in, so it replaces multiple bits and speeds up layout work on steel, aluminum, copper, plastics and wood.

Key Features

• Four-spiral flute design: Clears chips efficiently for faster cutting and smoother holes compared with single- or dual-flute step bits.
• 19-step sizing: Covers a broad range of hole diameters so users can drill multiple precise sizes without changing tools.
• M35 cobalt HSS with titanium coating: Offers increased strength and wear resistance for tougher jobs and longer life under moderate use.
• Tri-flat shank: The 2/5 in tri-flat shank improves grip in chucks and reduces slippage during high-torque drilling.
• Compact storage case: The included case keeps the step bit protected and portable for workshop or on-site use.

Who It's For

The ZELCAN step bit is best for homeowners, auto hobbyists and tradespeople who frequently drill through thin metals, plastics and wood and want a single tool that covers many sizes. It also suits anyone who values neat, deburred holes without swapping bits for every diameter.

It is less suitable for high-volume industrial production or for drilling very thick plate where full-diameter twist bits or hole saws are more appropriate. Users who need guaranteed consistent life under daily heavy sheet-metal use should consider hardened solid bits as a specialist alternative.

Pros & Cons

Pros

• Replaces many individual bits with one 19-step unit, saving time and storage space.
• Four cutting blades and spiral flutes give noticeably smoother cutting and chip evacuation on plastics and thin metal.
• Titanium-coated M35 HSS construction improves strength and extends usable life for general workshop use.

Cons

• Cutting performance on thicker or hardened sheet metal is mixed according to some users, so it may wear faster under heavy daily metal work.
• Sharpness and longevity can vary with material and technique, so proper speeds and lubrication are important to avoid premature wear.

Specifications

Brand	ZELCAN
Material	M35 high-speed steel with titanium coating
Sizes covered	3/16 in to 1-3/8 in (19 steps)
Flute design	Four spiral flute
Shank	2/5 in tri-flat shank
Included accessory	Compact storage case

Our Verdict

The ZELCAN 19-step M35 cobalt step drill bit is a practical, value-focused tool for workshop and home projects where multiple hole sizes are needed quickly. Its four-flute design and titanium-coated HSS give cleaner holes and reasonable durability for most DIY and light professional use, making it a good buy for anyone who wants fewer tool changes and compact storage.

Frequently Asked Questions

Will this cut stainless steel?
It can cut thinner stainless sheet with care, but performance is mixed on thicker or hardened stainless and life will be shorter than on softer metals.

What sizes does it cover?
The bit covers 19 steps ranging from 3/16 in up to 1-3/8 in to handle many common hole diameters without changing bits.

Does it include a case?
Yes, the step drill comes with a compact storage case for protection and portability.