The best 17/32-inch drill bit depends on the material and how often you drill. Drill America’s high-speed steel bit suits general-purpose work, while the M35 cobalt options are better suited to heat-intensive drilling in stainless steel and other hard metals. For multiple holes or convenient storage, consider a three-piece set; for a firmer chuck grip, consider the BECOLLO bit with a three-flat shank.
| Product | Best For | Notable Feature |
|---|---|---|
| Drill America KFD | General-purpose drilling | Black-and-gold-treated HSS |
| VALYRIANTOOL 3-Piece Set | Repeat drilling | M35 cobalt and split points |
| Satcrft M35 | Chip removal | Tapered web and large spiral flute |
| Narwhal 3-Pack | Organized storage | Storage case included |
| BECOLLO 2-Piece Set | Secure chuck hold | Three-flat reduced shank |
Drill America KFD Reduced-Shank Bit
Best for: General-purpose drilling where a standard high-speed steel bit is appropriate. This 17/32-inch KFD Series bit has a 1/2-inch reduced shank, which allows the larger bit diameter to be used with a compatible toolholding system.
Drill America lists high-speed steel as a combination of hardness and toughness for wear resistance. Its black-and-gold surface treatment is specified for stainless steel and other hard metals. The round shank is designed for use with a wide variety of toolholding systems.
Why it was selected: It provides a straightforward HSS option for buyers who do not specifically need a cobalt bit. Consideration: The listing identifies HSS, not M35 cobalt, so buyers prioritizing a cobalt-alloy bit for demanding metal work may prefer one of the alternatives below.
VALYRIANTOOL M35 Cobalt 3-Piece Set
Best for: Buyers who want multiple 17/32-inch bits for repeated work. The set contains three M35 HSSCO twist bits, each described as having a 1/2-inch reduced shank and a six-inch overall length.
The 135-degree split point is designed to help the bit center accurately and penetrate quickly. The black-and-gold polished treatment is described as adding lubricity and helping hold coolant near the cutting edge. Round shanks support use with a variety of toolholding systems.
Why it was selected: It combines cobalt construction, split points, and three matching bits in one set. Consideration: Confirm that the six-inch overall length and reduced-shank configuration suit your tool and work area before ordering.
Satcrft M35 Cobalt Bit
Best for: Metal-drilling tasks where the listed flute design is a priority. Satcrft describes this single 17/32-inch bit as M35 high-speed steel with five percent cobalt and heat treatment to HRC 67.
Its 135-degree split point is intended to reduce wandering and start holes accurately. The tapered-web helix is specified to add stability in tough materials, while the large spiral flute is designed to remove metal chips. The listing highlights high-temperature stainless steel drilling.
Why it was selected: Its stated chip-removal design distinguishes it from simpler twist-bit listings. Consideration: This is a single bit, so it may be less suitable than a multi-piece set if you need spares for repeated jobs.
Narwhal M35 Cobalt 3-Pack
Best for: Buyers who want three matching bits and a dedicated storage case. Each bit measures 17/32 inch in diameter, has a three-inch flute length, and is six inches long overall, according to the listing.
Narwhal describes the bits as fully ground M35 cobalt steel with five percent cobalt. The 135-degree split point is intended to make repeated holes in harder materials easier. The listed applications include hardened steel, stainless steel, and cast iron.
Why it was selected: The three-bit quantity and included plastic case make this a useful choice for keeping bits organized. Consideration: Check the three-inch flute length against the thickness of the material you need to drill.
BECOLLO Cobalt Bit Two-Pack
Best for: Buyers who want two cobalt bits with a shank designed for an extra-secure chuck hold. The listing describes these as five-percent-cobalt HSS bits with a 1/2-inch reduced shank and three flats.
The 135-degree split-point design is intended to support self-centering and reduce walking across a work surface. BECOLLO identifies hard metal, stainless steel, and cast iron among the intended materials.
Why it was selected: The three-flat shank is a practical differentiator for buyers who prioritize grip, and the set includes two bits. Consideration: Verify that your chuck accepts a 1/2-inch reduced shank before choosing this option.
Buying Guide: How to Choose a 17/32-Inch Drill Bit
Should you choose HSS or cobalt?
Choose standard HSS for general-purpose work when its listed capabilities match the material. Choose an M35 cobalt option if heat resistance and drilling harder metals are priorities. The product descriptions identify several cobalt bits for stainless steel, cast iron, or hardened metal, but the exact listed applications differ by product.
What does a reduced shank do?
A reduced shank has a smaller diameter than the cutting end. These products list a 1/2-inch shank for a 17/32-inch bit. Check the chuck’s capacity and the bit’s shank shape before buying. A round shank offers broad toolholding-system use according to the Drill America and VALYRIANTOOL listings; BECOLLO specifies three flats for an extra-secure chuck hold.
Do you need a split point or multiple bits?
A 135-degree split point is featured on the cobalt options here and is described as helping with centering or reducing bit wandering. If you expect to make repeated holes, a two- or three-piece set provides matching spares. If organization matters, Narwhal includes a plastic case; the other listed features do not specify a case.
What dimensions should you verify?
Confirm the 17/32-inch cutting diameter, shank size, overall length, and flute length against the job. A longer overall bit does not by itself establish how thick a workpiece it can drill. For the Narwhal set, the listing gives a three-inch flute length and six-inch overall length; VALYRIANTOOL lists six inches overall.
Frequently Asked Questions
What is a 17/32-inch drill bit used for?
It drills a hole with a nominal diameter of 17/32 inch. The appropriate bit material depends on the workpiece and drilling conditions.
Is 17/32 inch larger than 1/2 inch?
Yes. 17/32 inch is 1/32 inch larger than 1/2 inch.
Can a 17/32-inch bit have a 1/2-inch shank?
Yes. A reduced-shank design can pair a 17/32-inch cutting diameter with a 1/2-inch shank, as several products in this guide specify.
Which option includes a storage case?
The Narwhal three-pack listing specifies an included plastic storage case.
Which listed bit is designed for general-purpose use?
Drill America describes its high-speed steel bit as suitable for most general-purpose applications.