Speedbor IRWIN Tools 1866036 SPEEDBOR MAX Wood Drilling Bit, 4-inch by 7/8-inch

Very sharp, I have drilled a couple of dozen holes and it is still sharp. On great thing the bit does is grab the wood and pulls itself into the wood. So, you don't have to push hard on the drill.I bought another brand, and haven't even opened up that package.--Cooper

Much shorter than the regular type, perfect for getting into tight places. Pair this with a compact impact drill. I have ordered these a few time now they kick ass, avoid nails or they're toast

Cuts through 2x4s like butter. Got through about 60 studs (and a nail or two) before it was too full to continue.

This bit made very clean cuts into pine projects.

Did what I bought it for. Agressive

It did it's job, just the one use paid for it

This is an amazing drill bit. I bought it to drill holes to run wiring. It punches through a 2x4 stud wall with ease, and is through in 2 seconds. Highly recommend this bit.

Very good tool

Great drill bit fast and stronge. Would buy again.