This tool uses heat treated alloy tool steel, one inch base that fits a wrench or bench vise. Thin-wall construction allows use without removal of cones and locknuts.
Fits Atom®, Regina®, splined Zeus®, and some Schwinn Approved® freewheels
The FR-4 has 20 splines and is approx. 21.6mm in diameter.
Always use a skewer or axle nut to hold remover firmly in place.
Manufacturer's Part Number: FR-4