This is a drill that does what it promises. We built our own house and I used this bit for all of the wiring and it worked great. I especially like the rough tip of the screw, the bit didn't move, it just started drilling where I put it in. I've only used it on a 2x4 but it seems just as sharp as the day I bought it. Would definitely buy again but could buy something a little shorter. Once attached to the drill, it became a bit long and difficult to fit between 16" studs.