Rennsteig retaining ring tool srw 1000 rennsteig werkzeuge 783 000 61 this tool from rennsteig can be used to open close and hold any retaining ring from 400 to 1000 diameter the rings are held securely thanks to short direct contact sockets the srw 1000 can be operated simply with an allen key ratchet wrench or cordelss screwdriver rennsteig 783 000 61 retaining ring tool srw 1000