Need to go deep? Really deep? The Bad Dog 18" Extra-Long Multipurpose Drill Bit Set is built to drill where most bits can’t even reach. Featuring the same industrial-grade carbide-titanium-cobalt tips found in our core multipurpose line, these 18-inch monsters are made for maximum reach and maximum bite.
Drill through steel, wood, concrete, tile, plastic, stone, and more—without switching bits, changing tools, or sacrificing performance. Whether you're working behind walls, through thick framing, or deep inside equipment housings, these extra-long drill bits are built to keep drilling and never back down.
18" Extended Length – Made for extreme reach and deep hole drilling
Bad Dog Carbide Bite – Cuts through steel, wood, tile, stone, plastic, and more
1/4", 3/8", and 1/2" Bits – Feature 1/4" quick-connect hex shanks
3/4" Bit – Heavy-duty round shank with flat side for secure grip
USA Made – Proudly manufactured in Bristol, RI
Lifetime Guarantee – If it breaks, dulls, or fails—we replace it. Period.
1/4" x 18" (Hex Shank)
3/8" x 18" (Hex Shank)
1/2" x 18" (Hex Shank)
3/4" x 18" (Round Shank with Flat)
Whether you're running conduit through walls, drilling between studs, or fabricating large builds, these long-reach multipurpose bits deliver clean holes, fast performance, and the kind of durability Bad Dog is known for.
Need long bits, but not that long?
Check out the 12" Bad Dog Multipurpose Bit Set for a little less reach, but the same bite.
Dull or damage our tools and we will repair or replace them.
Economical Flat Rate Shipping for orders under $50 in the USA. Some exclusions apply.
Don’t love your Bad Dog Tools? Return them in 60 days for your money back.
