NOTE: THIS WILL NOT WORK WITHOUT THE STAINLESS STEEL DRIVER THAT IS INCLUDED IN THE ORIGINAL KIT.  This part is intended to be a replacement for lost parts OR as a second collar piece for convenience. If you have not bought the original kit, this will NOT work. 

ALSO - AN ADDED BONUS: THE SS DRIVER INCLUDED IN THIS KIT FITS MOST BUMPER PULL TOP-CRANK TRAILERS WITH 1/2" or 9/16" SHAFT.