This TRIMAX Receiver/Coupler Set includes a receiver lock (for 2"x2" receivers) with a 5/8" pin (for Class III receivers) and a coupler lock (for surge brake couplers up to 3-1/2" span). This set is keyed alike with 4 keys for convenience.
TRIMAX T3 - 5/8" Receiver & TC3 - 3-1/2" Span Coupler Lock
TRIMAX T3 - 5/8" Receiver & TC3 - 3-1/2" Span Coupler Lock