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 21.6 mm in diameter
-Regina/Atom/Zeus/Schwinn
-Heat treated alloy tool steel, one inch base fits wrench or bench vise. Thin wall construction allows use without removal of cones and locknuts.
-Available for Pickup within 2 to 1 businesses days