Diablo DAG3070 3/4 Inch x 17-1/2 Inch Auger Bit is a long auger drill bit built for boring clean, fast holes in wood and nail-embedded wood. This is an auger bit designed for drilling clean, precise holes in wood framing and other wood drilling applications where jobsite material is not always clean. Model Number: DAG3070. With a 3/4 inch diameter, 17-1/2 inch overall length, and 13-1/2 inch working length, it is sized for deeper boring work where reach matters just as much as cutting speed.

The big selling point here is how Diablo set this bit up for real framing conditions instead of ideal shop material. The two-step cutting action helps create a cleaner, more controlled hole, while the self-feeding Dura-Tip pulls the bit into the cut. That means less forcing from the user and a steadier drilling feel, especially when you are running repeated holes through studs or stacked material.

Diablo also uses a dual cutting edge design to keep the cut moving smoothly in both clean wood and nail-embedded wood. If you have ever hit hidden fasteners with a basic wood bit, you already know why this matters. A bit that keeps working through mixed material saves time, reduces bit changes, and helps you finish the run without babying the tool.

The deep flute design is another practical feature that matters on the job. Better chip evacuation helps clear waste out of the hole faster, which reduces clogging and keeps the bit cutting instead of rubbing. In practical terms, that means quicker boring, less heat buildup, and more holes per battery charge when you are working with a cordless drill driver or impact tool.

On the drive end, the 7/16 inch hex quick-change shank is built for a more stable connection in corded and cordless impact wrenches, impact drills, and drill drivers. That larger hex interface is a good match for higher-torque tools and helps the bit hold up better when you are pushing through dense framing lumber or older material that may have nails buried inside.

In terms of design, this is a straightforward jobsite accessory that focuses on durability and drilling performance rather than gimmicks. The long body gives you extended reach, the self-feeding tip helps with faster starts, and the aggressive flute pattern is there to keep material moving out of the hole. For anyone drilling repeated pass-through holes for rough-ins or structural work, those details are what separate a useful auger bit from one that just looks good on the rack.

The Diablo DAG3070 3/4 Inch x 17-1/2 Inch Auger Bit makes the most sense for contractors and serious DIY users who need one bit that can handle wood boring in less-than-perfect conditions. It is a strong fit for carpentry, remodeling, framing, and general construction work where speed, reach, and the ability to deal with nail-embedded wood matter more than having a delicate finish-only bit.

Diablo DAG3070 3/4 Inch x 17-1/2 Inch Auger Bit is the one you grab when the wood is not going to play nice

This is a purpose-built long auger bit for guys who need reach, clean starts, and better odds of getting through nail-riddled framing without killing the bit.

• Who it's for: Carpenters, remodelers, framers, and serious DIY users boring larger holes through wood and nail-embedded wood.
• Why it stands out: The self-feeding Dura-Tip, dual cutting edges, and deep flutes all work toward the same goal: faster drilling with less fighting from the bit.
• Worth knowing: This is a single 3/4 inch auger bit, not a set, and it is best matched with tools that accept a 7/16 inch hex shank.

• What material is this bit designed to drill? It is designed for wood and nail-embedded wood.
• What is the diameter of this auger bit? The bit diameter is 3/4 inch.
• How long is the bit? The overall length is 17-1/2 inches, with a 13-1/2 inch working length.
• What tools can it be used with? The manufacturer states it can be used in corded or cordless impact drills, drill drivers, and impact wrenches that accept a 7/16 inch hex shank.