William G.wrote a review of Park Tool Valve Core Tool on October 7, 2018
Familiarity: I've used it several times
This tool make getting valve stems in and out a snap—way better than a pliers or the little plastic core removers. These are great for removing core to put in sealant, putting the core back in and for backing the core out if it gets stuck with sealant. I wish I’d bought one sooner!