I've been debating buying the removable bit kit from Leatherman. I still might but for the time being, I modded a removable driver kit made for a Winchester Multi-Tool to fit my Rebar. The square bar on the Winchester was slightly smaller than the Rebar phillip screwdriver but not by too much. Using a file I was able to enlarge the bit holder square so it fit snugly on the Rebar Phillips. There's also a small magnet inside that holds the bit as well as the bit holder securely. I'm still deciding on which bits to carry but the whole set slides nicely in the rear pocket of the sheath.