This is a Coupling Hitch Lock for most modern Bradley trailer hitches complete with 4 keys and key ring. Lock is inserted into the lock hole of the side of the trailer hitch (see images) and is suitable for most Bradley cast trailer coupling/hitches that have a 19mm / 3/4" diameter hole in the lug cast in the side (Early couplings manufactured before 200 did not have this cast in the side). Will not fit Bradley Spring Box .
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