Park tool freewheel remover wrench frw 1the frw 1 is a one inch socket and securely holds freewheel and lockring tools fr 1 through fr 8 plus the bbt 5fr 11 for removal and installation features an investment cast head with locking setscrew and a long round vinyl dipped handle for superior leverage features one inch socket securely holds freewheel investment cast head lone round vinyl dipped handle note always use a skewer or axle nut to hold a cassettefreewheel tool in place during r