Heat treated alloy tool steel, one inch base fits 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 approximately 21.6mm in diameter
. Always use a skewer or axle nut to hold remover firmly in place