Kreg Tool DKDB Stepped Drill Bit is a replacement stepped drill bit for Kreg high-production pocket-hole machines. This is a stepped drill bit designed for drilling machine-made pocket holes in production woodworking setups. Model Number: DKDB. If you run a compatible Kreg machine and need the correct replacement bit, this is the part built for that job.

This bit is made from heavy-duty cobalt steel, which is the kind of material choice that matters when a bit is used over and over in a commercial or high-output shop. Instead of being a generic drill bit that happens to fit, the DKDB is purpose-built for Kreg machine pockets, so you get the stepped profile needed for proper pocket-hole joinery with the machines it was designed around.

One of the main advantages here is the one-piece design. Kreg calls out that this design eliminates clogging and delivers a smoother, faster drilling stroke than drill bits that use replaceable center drills. In practical terms, that means less interruption during repetitive drilling cycles and more consistent performance when the machine is doing what it is supposed to do all day.

The 3/8 in diameter, 3/8 in shank, and 6-3/4 in overall length make this a specialized bit, not a general-purpose shop bit. Those dimensions are tied to the machines and the pocket-hole process it supports. If you are replacing a worn production bit, matching the original format matters because it affects fit, feed, and final hole shape.

Compatibility is the big buying point with this part. The Kreg Tool DKDB Stepped Drill Bit is for exclusive use with Kreg DB55, DB110, D3100, DK1100, and DK5100 pocket-hole machines. Kreg also specifically notes that it is not compatible with the Foreman DB210 Pocket-Hole Machine. That kind of fit detail is worth paying attention to before ordering, especially if your shop has more than one Kreg platform in use.

If you are purchasing replacements for a DK3100 machine, Kreg notes that you should also order a Left-Hand Stepped Drill Bit for the center spindle of that 3-spindle machine. That is a useful detail for buyers maintaining a full production setup, because it keeps you from ordering only part of what the machine needs and finding out after downtime has already started.

This bit makes the most sense for cabinet shops, production woodworking operations, and anyone using Kreg commercial pocket-hole machines on a regular basis. If you own one of the listed machines, this is the correct type of replacement bit. If you need a bit for a handheld jig or for the Foreman DB210, this is not the one to buy.

Buy the right replacement, not a close-enough bit

The Kreg Tool DKDB Stepped Drill Bit is the kind of part that makes sense when uptime matters and your pocket-hole machine needs the exact bit it was built around.

• Who it's for: Shops and woodworkers running compatible Kreg DB55, DB110, D3100, DK1100, or DK5100 pocket-hole machines.
• Why it stands out: Cobalt steel, a one-piece anti-clogging design, and machine-specific compatibility are what make this more than just another step bit.
• Worth knowing: It is not for the Foreman DB210, and DK3100 owners should pay attention to the separate left-hand bit requirement.

• Which machines does this drill bit fit? It is for exclusive use with Kreg DB55, DB110, D3100, DK1100, and DK5100 pocket-hole machines.
• Is this bit compatible with the Foreman DB210? No. Kreg specifically states that this bit is not compatible with the Foreman DB210 Pocket-Hole Machine.
• What is the bit made from? It is made from heavy-duty cobalt steel.
• What size is the bit? The bit diameter is 3/8 in, the shank diameter is 3/8 in, and the overall length is 6-3/4 in.