If you are looking to remove that Sun Tour freewheel on your vintage ride, you're looking at the right tool. The Park Tool Freewheel Remover for Sun Tour 2 Notch is constructed of heat-treated tool steel for maximum durability and the 1-inch base has flats to fit in a wrench or vise. The thin wall construction lets the tool easily fit between axle cones and locknuts so you don't have to remove them for backing off the freewheel.
