The Ridgid 60648 MegaPress XL Ring is designed for use with the RP 330, RP 340, RP 350, and RP 351 Standard Series Press Tools (not included) in which it will press fittings created by the MegaPress XL tool onto pipe 3 inches in size in under 25 seconds. An individual ring is required for each pipe size. This ring can only be actuated with a Z3 Actuator such as the 60658 Press Booster (not included) which will increase the output of Standard Series Press Tools.