This Hitch Receiver Lock Set has test specifications exceeding 32,000 lb and has (2) 5/8" pins that fit all Class III, IV, and V receivers. One lock has a 4-3/8" span and the other a 3-1/2" span. Both are made of machine-hardened steel.
TRIMAX Swing Away Trailer Tongue Lock, 5/8" W/ 6-1/8" Span
TRIMAX Swing Away Trailer Tongue Lock, 5/8" W/ 6-1/8" Span