A 16/64-inch drill bit is the same diameter as a 1/4-inch bit, so these products are relevant when you need a quarter-inch hole. For metal drilling, cobalt options are the strongest match in this selection: the BOSCH M42 bit is a single-bit choice for heat-intensive work, while the M35 sets suit buyers who want multiples. The COMOWARE set is better for mixed-material DIY projects, and the coated three-pack offers a small quantity of M35 bits.
| Product | Best For | Key Detail |
|---|---|---|
| COMOWARE Titanium Set | Mixed-material DIY | Includes sizes from 1/16 to 1/4 inch |
| 15-Piece M35 Cobalt Set | Multiple quarter-inch metal bits | Fifteen 1/4-inch bits |
| BOSCH M42 Cobalt Bit | Heat-resistant metal drilling | Single bit with three-flat shank |
| Drill Hulk M35 Set | Sharpenable metal bits | Twelve bits; 135-degree split point |
| Yellow Paw M35 Coated Pack | Small coated-bit pack | Three bits with TiAlN coating |
COMOWARE Titanium Twist Drill Bit Set
Best for: DIY users who need a 1/4-inch bit alongside smaller sizes for different jobs. This 16-piece set spans 1/16 to 1/4 inch and is listed for wood, plastic, and aluminum alloy.
The bits use high-speed steel with a titanium coating and have two flutes intended to clear chips and debris. Their 1/4-inch hex shanks are designed for quick-change chucks. The set includes an index and storage case, which helps keep the range organized.
Why it was selected: It offers the broadest size range here and is more versatile than packs containing only quarter-inch bits. Limitation: It is not a cobalt set, so choose a cobalt option for hard-metal drilling requirements.
15-Piece M35 Cobalt Drill Bit Set
Best for: Buyers who want several identical 1/4-inch bits for metal and other listed materials. The pack contains 15 bits made from M35 high-speed steel with 5% cobalt, and the product listing names steel, stainless steel, cast iron, hard plastic, and wood as applications.
Each bit has a 135-degree split point, which is designed to help center the bit and reduce walking on hard surfaces. A plastic case is included for storage.
Why it was selected: It provides the largest quantity of matching 1/4-inch cobalt bits among the listed products. Limitation: The assortment is one size only, so it does not replace a multi-size drill-bit set.
BOSCH M42 Cobalt Metal Drill Bit
Best for: Metalworking buyers who need one 1/4-inch bit intended for high-heat applications. This M42 cobalt bit contains 8% cobalt, and the listing names stainless steel, cast iron, titanium, light-gauge metal, and aluminum as target materials.
It measures 1/4 inch by 4 inches and has a three-flat shank. The manufacturer describes the M42 alloy as heat-resistant and designed for durability in demanding drilling applications.
Why it was selected: Its M42 composition and stated high-heat resistance distinguish it from the M35 choices. Limitation: It is a one-piece product, so it offers no spare bit or alternate diameter.
Drill Hulk M35 Cobalt Drill Bits
Best for: Users who want a dozen 1/4-inch bits for hard metal or stainless steel. Each is jobber length, with a 2-3/4-inch flute length, 4-inch overall length, 135-degree split point, and three-flat shank.
The bits are made from high-speed steel with 5% cobalt. The listing states that the cobalt hardness extends through the material, allowing the bits to be repeatedly sharpened as needed.
Why it was selected: It combines a useful multi-bit quantity with stated sharpening capability and defined dimensions. Limitation: This pack contains only 1/4-inch bits, not a range of sizes.
Yellow Paw M35 TiAlN-Coated Drill Bits
Best for: Buyers who want a small pack of coated 1/4-inch bits for metal, steel, or aluminum. The three-pack uses M35 steel with 5% cobalt and a titanium aluminum nitride coating. Each bit is listed as 4 inches long, with a 2-3/4-inch working length and a 135-degree split point.
The listing describes a 1/2-inch rounded shank and includes a plastic storage case. The split point is intended to reduce walking when starting holes in stiffer materials.
Why it was selected: It pairs M35 cobalt with a specified coating and a compact pack size. Limitation: It contains only three bits, and its shank is larger than a typical 1/4-inch shank; check your drill’s chuck capacity before choosing it.
Buying Guide: How to Choose a 16/64-Inch Drill Bit
Is 16/64 the same as 1/4 inch?
Yes. Sixteen divided by sixty-four reduces to one quarter, so a 16/64-inch hole calls for a 1/4-inch drill bit. Check the bit diameter before purchase because some sets include many sizes but only one 1/4-inch bit.
Which material is appropriate for the job?
For mixed household work in wood, plastic, or aluminum alloy, the COMOWARE set offers a range of sizes and titanium-coated HSS bits. For harder metals, consider a cobalt option: the listed products use M35 or M42 steel. The BOSCH bit has the highest stated cobalt content in this group, at 8%; the M35 products list 5%.
How many bits should you buy?
A single bit suits a specific job when you do not need spares. Multi-piece packs provide replacements or multiple matching bits, but these cobalt packs remain 1/4-inch-only. Choose a multi-size set if you also need smaller or larger holes.
Why check the shank and length?
Confirm that the shank fits your drill’s chuck or quick-change holder. The COMOWARE bits have 1/4-inch hex shanks, while the BOSCH and Drill Hulk listings specify three-flat shanks. Check working length as well as overall length when the material is thick or the hole must reach a particular depth.
Frequently Asked Questions
What size drill bit is 16/64 inch?
It is 1/4 inch, or 0.25 inch. The fractions are equivalent.
Can a 1/4-inch bit drill stainless steel?
The listed cobalt bits are specifically presented for stainless steel drilling. Select a bit whose material and application details match your work.
What does a 135-degree split point do?
It is designed to help the bit center and reduce walking when starting a hole, particularly on hard surfaces.
Should I choose M35 or M42 cobalt steel?
The M35 products listed contain 5% cobalt, while the BOSCH M42 bit contains 8%. Compare the stated material, bit count, shank, and intended application to choose between them.