Note with this set that these sockets fit 3 different sizes of actuator/ratchet. Sockets E4-E8 use a 1/4" drive, E10-E16 use a 3/8" drive, and E18-E20 use a 1/2" drive. Of course you can always use an adapter, but unfortunately this kit doesn't come with one, which I consider an omission. The sockets themselves are very durable and seem to last a long time. Each rosette has the appropriate size engraved on the side for easy identification. They are also numbered on the inflated case forβ¦