You would think that with the position of the jacks you could swap out the 1/4 and 1/2 bits as needed - WRONG! At least I couldn't get any of them out without destroying them. Also, and perhaps more seriously, although the bits fit snugly into the hubs on their own, once inserted into the holes in the base, they are too tight for the bits to be easily inserted or removed. I really like the grommets but the sockets are too deep to fit in standard wall cabinets as are the issues mentioned. Myβ¦