Premium HSS 12″ Long Boy Drill Bits – 1/8″ to 1″ – Incl. 3/4″ x 12″ Longboy

Premium High Speed Long Boy Drill Bit – 12″ Long Drill Bits

Our 12 inch drill bit, the Premium High Speed Long Boy, is built for extra-deep drilling where standard jobber bits just can’t reach. Each bit is 12″ overall with a 9″ cutting length, making them the go-to choice for beam drilling, long-reach applications, and boring through thick materials.

Manufactured from premium high-speed steel (HSS), these bits deliver durability, heat resistance, and consistent performance in a wide range of materials, including hard steel, wood, plastics, fiberglass, and laminates.

Sizes over 1/2″ have a cut-down 1/2″ shank, so they fit standard 1/2″ drill chucks with no special equipment. You get big-diameter capacity with everyday drill compatibility.

If you need a reliable bit for structural work, construction, or shop projects that demand extra reach, the Long Boy series gets the job done right.

What to Expect from a 12″ Longboy

Every size is the same 12″ overall with a 9″ flute, from 1/8″ all the way up to 1″. Looking for a 3/4 x 12 long drill bit? It’s here, with a 1/2″ reduced shank that drops into any 1/2″ chuck. Run it slower than a jobber, back out to clear chips, and use cutting fluid in steel. Just a BIT more twisted, from DrillBitWarehouse.com.

Features

• Premium high speed steel (HSS)
• 12″ overall length, 9″ cutting length
• Sizes 1/8″ to 1″
• 1/2″ cut-down shank on sizes over 1/2″
• Fits standard drill chucks
• Heat resistant for consistent performance

Long Boy Drill Bit Specifications

12 Inch Drill Bit Size Chart

Need bigger than 1″? See our 12″ Long Boy drill bits over 1″. Need more reach? Step up to the 18″ Super Long Boy drill bits. Shorter job? Try the 8″ Long Boy drill bits, or browse all extra-long drill bits.

Long Boy Drill Bit FAQ

What shank is on the 3/4″ x 12″ Long Boy? A 1/2″ reduced (cut-down) shank, so it fits a standard 1/2″ drill chuck. Every size over 1/2″ has the same shank.

How deep can a 12 inch drill bit drill? The flute is 9″ long, so you can drill about 9″ deep and still clear chips.

Are these drill bits for wood or metal? Both. They drill hard steel, wood, plastics, fiberglass, and laminates.

When only the best will do, contact us at 1-800-350-8665