Amir Najamwrote a review of Park Tool Valve Core Tool on December 12, 2018
Familiarity: I've used it several times
You know when you need it, and I usually do. Got both ends which is nice when I switch over to schrader soon. I hear it's actually the way to go on MTBs since we run lower pressure. I mean think about it, a bigger hole to dump sealant and air into is better than presta.... Even Stans knows this, they make schrader stems now. Only a matter of time!