Park Tool FR-4 Sprocket puller

Heat treated alloy tool steel, "one" base fits spanner or vice. Thin-walled construction allows use without disassembly of tapers and locknuts.

Features:

• Fits Atom, Regina, Zeus with multi-groove splines and some Schwinn-approved freewheels
• The FR-4 has 20 keyways and a diameter of approximately 21.6mm.
• The centre bore for axle clearance is 10mm
• Always use a skewer or axle nut to hold the tool firmly in place during removal.