Well done. (Additional info: I've tried them a few times and they didn't work. They fit the drill well, but they smudge where the drill goes into the chuck, causing the drill to slip once it encounters some resistance. I have tried to remove the grease but they still slip.rather than messing with them it's easier to go to a regular cartridge with a regular bit and just use them.next I'm going to try a Festool set which I did should have done first. More expensive, but I'm sure they work.)