Trimax Rapid Hitch Keyed Alike Adjustable Receiver Lock Set. One key operates both locks. The T3 Receiver Lock fits a 5/8" x 2-3/4" span. The TH4 Adjustable Hitch Lock fits a 5/8" x 4-3/8" span. The 5/8" pin fits all Class III IV and V receivers. The O-ring seal and water tight cap help seal out dirt. Easy 1/4 turn locks and unlocks head. Tested specifications exceed 32000 lbs. Constructed with machine forged chrome steel. Features of Trimax TH43 Rapid Hitch Keyed Alike Adjustable Receiver Lock Set Keyed-alike adjustable receiver locks 5/8" pin fits all Class III IV and V receivers T3 Receiver Lock fits a 5/8" x 2-3/4" span TH4 Adjustable Hitch Lock fits a 5/8" x 4-3/8" span Tested specifications exceed 32000 lbs. Package Contents: Trimax TH43 Rapid Hitch Keyed Alike Adjustable Receiver Lock Set Trimax TH43: Rapid Hitch Keyed Alike Adjustable Receiver Lock Set