Park Tool FR-4 Freewheel Removal Tool For Atom, Regina, Zeus

Are your well-muscled legs spinning out your current Atom, Regina, or Zeus freewheel? The Park Tool FR-4 Freewheel Removal Tool makes it easy to remove and replace your single speed freewheel. Fits Atom, Regina, splined Zeus, and some Schwinn Approved freewheels The FR-4 has 20 splines and is approximately 21.6mm in diameter 1" base fits most wrenches or vices