Valve cores belong to an elusive species; one that favors staying hidden over coming out into the open at all costs. Small and quiet, they can wreak havoc on your ride plans if you're trying to change a flat or swap a wheelset, which is what makes a tool like Feedback Sports' Valve Core Wrench so indispensable. This small tool comes with a metal core capable of gently drawing Presta or Schrader valves into the daylight, and a grippy handle to make the process easier on your fingers. Stash it in your toolbox and you'll be surprised at how many times you call upon it.