Easily remove four-notch BMX freewheels from their hubs with the Park Tool Freewheel Remover: BMX. Forged from heat-treated alloy tool steel, this remover has a one-inch base to fit your wrench or bench vise, and uses a thin wall construction to get the job done without the removal of cones or locknuts. This particular remover has four notches approximately 32mm across measured inside to inside and 40mm outside to outside, and fits over axles with a thread diameter up to 16mm.