Here is the Screwpop, a 4-in-1 keychain tool that easily fits on any size keyring. The Screwpop comes with a screw-bit that offers phillips screwdriver #2 and flathead screwdriver #2 on each of its heads. When the screw-bit is removed, the empty shaft can then be used as a hexagonal 1/4″ nut driver while the keyring itself is a bottle opener.
The 4-in-1 Screwpop keychain tool is priced at $4.95.