Park Tool FR-4 Atom Splined Freewheel Remover

• Fits Atom¬Æ, Regina¬Æ, splined Zeus¬Æ, and some Schwinn¬Æ-approved freewheels
• The FR-4 has 20 splines and is approximately 21.6mm in diameter
• Center bore for axle clearance is 10mm
• Always use a skewer or axle nut to hold tool firmly in place during removal

Heat treated alloy tool steel, one inch base fits wrench or bench vise. Thin wall construction allows use without removal of cones and locknuts.