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Silver twist drill bit with three flat shank flats and split point tip

Drill America

Drill America 37/64in HSS 1/2in Shank KFD Drill Bit pneumatic accessory

SKU CH-33HK-CFF8B

HSS drill bit with 1/2" reduced shank and three-flat grip for 37/64" holes

  • Product typeDrill Accessories
  • 37/64-inch size drills precise large-diameter holes
  • HSS construction resists wear during heavy use
  • Killer Force split point starts cuts without walking
  • 1/2-inch three-flat shank prevents slipping in chuck

Drill America 37/64in HSS KFD Drill Bit

This Drill America accessory is a high-speed steel drill bit built for heavy-duty drilling tasks. It features a KFD (Killer Force) design with a split point for accurate starts and reduced walking. The bit suits professionals and DIY users needing reliable performance in metalworking applications.

1/2in Reduced Shank with 3-Flat Design

The bit has a 1/2 inch reduced shank with three flats that prevent slipping in the chuck during high-torque use. Its flute length measures 3 inches and overall length is 6 inches. Buyers needing a larger shank diameter or a longer flute length for deep-hole drilling should verify compatibility before purchase.

How it compares

Measured against everything we stock in Bits, Hole Saws & Accessory Kits, at today’s prices. Recalculated every night.

Price $9.99
Cheaper than about 88% of the 5,493 comparable items (median $27.99).

Specifications

Product
Brand nameDrill America
Product typeDrill Accessories

Questions about this item

What does the 37/64 inch size mean when I fit this bit in a drill?

The 37/64 inch diameter creates a 0.5781 inch hole, and the 1/2 inch reduced shank fits standard three-jaw chucks without needing a larger chuck.

How does the 3-flat shank affect grip in a keyed or keyless chuck?

The three flats give the chuck jaws positive contact surfaces, reducing slip under heavy torque compared with a round shank.

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