Cobalt Drill Bit 7/16 in Twist Drill Bits Pack of 5 - M35 Jobber

In this review the focus is on a practical 7/16 in drill bit set aimed at users who need reliable metal drilling without premium tooling costs. The bottom line: these are industry grade M35 cobalt drill bits that handle stainless and mild steel better than ordinary HSS, packaged as a 5-piece set in an index storage case for neat organization. They suit hobbyists and tradespeople who want a sharp, hardened bit for tougher metals while avoiding specialty sizes or coated variants.

Key Features

• 7/16 in size: A common diameter that fits most power drills and is useful for metal fabrication, repair work, and larger pilot holes in wood and plastic.
• M35 high speed steel: Contains 5% cobalt for increased hardness and heat resistance, helping the bits keep their edge when drilling harder metals.
• 135 degree split point: The split point geometry reduces walking so drilling starts quickly and accurately without a center punch.
• Fully ground spiral flute: Polished and ground flutes clear chips efficiently and reduce friction and heat buildup for longer cutting runs.
• Index storage case: The included case keeps the five bits organized and protected, making it easier to transport and find the correct size.

Who It's For

This set is best for home mechanics, metal fabricators, and serious DIYers who regularly drill into stainless steel, cast iron and other hard metals but do not need a full metric assortment. The M35 composition and split point geometry make it a practical choice where durability and accuracy matter.

Those who should look elsewhere include users who need delicate micro-drilling, coated bits for extreme wear resistance, or very large industrial quantities; also, if you only drill soft materials, a standard HSS set will be cheaper and sufficient.

Pros & Cons

Pros

• Good cutting performance in mild steel and stainless due to the 5% cobalt M35 alloy and sharp factory grind.
• Reduced bit walking from the 135 split point, giving more precise starts without a pilot punch.
• Durable finish and polished flutes help chip evacuation and reduce heat during extended drilling.
• Pack of five in an index case provides neat storage and ready transport to job sites.

Cons

• Some users note mixed long-term durability compared with premium cobalt brands, so heavy continuous production use may reveal wear sooner.
• Only one size is included, so additional sizes must be purchased separately for a full set.

Specifications

Diameter	7/16 in
Material	M35 high speed steel (5% cobalt)
Tip geometry	135 degree split point
Shank type	Straight shank (fits most power drills)
Length	Jobber length
Quantity	Pack of 5 bits
Storage	Index storage case included

Our Verdict

For anyone needing reliable 7/16 in bits for occasional to moderate metalworking, this M35 set delivers solid value: the cobalt alloy and split point mean cleaner starts and better life in stainless and steel than generic HSS. It is a sensible buy for DIYers and small shops, while production shops seeking maximum longevity may prefer premium industrial-grade options.

Frequently Asked Questions

Can these bits drill stainless steel?
Yes, the M35 composition and split point are designed for hard metals including stainless, but moderate speed and steady pressure are recommended.

Will they fit my cordless drill?
Yes, the straight shank is compatible with the majority of power drills and chucks on the market.

Do they require lubrication?
Using cutting fluid or coolant when drilling hard metals will extend bit life and reduce heat.