The leading cause of tow system failure is towing out of level. Use the appropriate size drop to level out your towing system. Drop can be turned up or down to either lower or raise the hitch height. The leading cause of tow system failure is towing out of level. Use the appropriate size drop to level out your towing system. The drop can be turned up or down to either lower or raise the hitch height by 10". Heavy duty 10,000 lb. capacity with a 400 lb. tongue weight rating