Duo-Bit Standard Masonry Drill Bits

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Rebar Cutter Adapter Shank

The rebar cutter heads require a shank adapter to mount them on. This shank comes in multiple styles, so you can find the proper one to work with your hammer driver. Whether you use SDS-Max, SDS-+,or Spline, these are ready for the job.

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Heavy Duty Cobalt Drill Bits

Our Cobalt High Speed drill bits are made of high speed Cobalt Steel. The Cobalt content adds high abrasion resistance to the already hard working properties if our bits. Heavy web construction and 135 degree Split-Point add to the long life of these bits. Available in sizes 1/32″ – 1/2″.

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21 Piece Impactech Driver Bit Set

The Impactech driver bit set contains 21 bits made from S2 modified shock resistant steel for professional performance and durability. These bit’s patented spiral torsion zone absorbs impact and extends bit life. The proprietary precision CNC machined tips provide an excellent fit in fastener recess. Impactech bit have been tested to outperform all leading brands in lifecycle and tip failure testing.

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Jobber Drill Bits, Fractional Sizes, Cobalt

These Cobalt Jobber Drill Bits are made from high-speed steel, with a 118° angle tip, and a cobalt layer finish.
These bits are in Fractional size. American Wire Size bits are listed separately. Click the Jobbers tab below to see more.

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Paddle Bits, Individual

Paddle bits, also called spade bits, have a wide, flat blade. They are commonly used by tradesmen such as electricians and plumbers for drilling holes through studs in walls for running wiring or pipes (auger bits and hole saws are also used for this), but they also have a place in the woodshop for drilling on fine woodworking projects.
An extension kit is available for the extreme jobs. It includes a 12″ extension shaft, and a bent-hex tool to securely tighten the retaining screws when the paddle bit is installed. (See image.)

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Double End Drill Bits

With these double end drill bits, you can work twice as long without needing to carry a second bit. No worrying about losing it before it’s needed. As the first end gets worn out, simply remove the bit from the drill, turn it around, and insert the worn end in the chuck. Then get right back to work.

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“Silver & Deming” Drill Bits

One particular type of reduced-shank drill bits are Silver & Deming (S&D) bits, whose sets run from 33/64″ to 1″ drill body diameter with a standard 1/2″ reduced shank for all. This allows drill presses with 1/2″ chucks to run the larger drills. S&D bits are 6″ in length with a 3″ drilling depth.

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Countersink Drill Bits

Countersinking screws is a often used method for ensuring a flush surface, without bumps of screwheads getting in the way. These cross-hole countersinks are specially designed so that the trailing edge of the hole makes the cut, and they excel at ejecting chips as they drill. Made of strong steel, they ensure years of precision work.

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Jobber Drill Bit Sets

Jobber drill bits are well-named, because they do the job as expected.
The basic set contains bits made from High-Speed Steel (HSS) with a black oxide finish. The distinctive Black&Gold set has a special finish to help prevent rust.
The Mechanics Stubby set features a reduced length, which means it is less prone to breakage, even under hard use. The Cobalt drill bits are specially made to drill through hard metals, including stainless steel.

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ThunderTwist SDS Drill Bits

The ThunderTwist’s TriCarb grade tip guarantees longer life with faster penetration due to increased chiseling action. ThunderTwist’s flute design, combined with copper brazing alloy creates the most reliable drill bit on the market. It is made with high quality American chrome-molybdenum nickel steel that is vacuum heat treated, and shot-peened for superior strength under the roughest conditions.

Duo-Bit Standard Masonry Drill Bits