The Trimax T3 Receiver Lock has a 5/8" dia. and 2-3/4" span for fitting 2" Class III, IV, and V receiver hitches. Constructed of rugged steel with a black epoxy powder-coat, this lock features an internal O-ring and weather-resistant rubber cap to help keep water, grime, and dirt out of the locking mechanism. This lock comes with two round keys that won't bend or break.• 5/8" pin fits 2" class III, IV, and V receiver hitches• 2-3/4" span• Made of rugged steel with black epoxy powder-coat• Rubber cap protects keyhole from water, grime and dirt• Includes two keys Internal O-ring & weather-resistant rubber cap seal out moisture Includes 2 round keys with easy 1/4 turn lock & unlock | Trimax Black Receiver Lock, 5/8" dia, 2-3/4" Span