As an electrician, I go through a lot of small-bore wood bits. I picked up a few of these in 5/8", 3/4" diameters and 7" and 18" lengths. They are, without a doubt, the best drill bits I've ever used. They truly eat nails without eating the bit, and they self feed great. The 7 inchers are great for cordless drills. Never blow up a spade bit on a nail again! My only gripe? The material houses don't stock them! I plan to order a lot more through Amazon.