I own 2 of the original 12v drills manufactured by Panasonic, the full size model and the Predator. I purchased 4 of these drills hoping the batteries would fit in the older drills. Fortunately they do, otherwise they would be going back.This drill has a serious flaw. On the high RPM setting the clutch slips. Reminds me of the slipping transmission in an old Buick I had. It was fine until I accelerated then it slipped and jerked when it "caught". This drill will not allow you "feather" screws in, on the high RPM setting. Since I have 4 of the drills and all of them do the same thing, I didn't get a fluke.In my estimation the lack of a usable high RPM setting makes this drill a loser.