The Trimax SXTS32 Stainless Steel Receiver Lock fits 1-1/4" Class II receivers and includes a 5/8" adapter sleeve for fitting 2" Class III, IV, and V receiver hitches. Constructed with machine-forged stainless steel, 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.• 1/2" x 2-3/4" locking receiver pin with 5/8" adapter sleeve• Fits 1-1/4" Class II receivers• Fits 2" Class III, IV, and V receivers with adapter sleeve installed• Made of stainless steel• Rubber cap protects keyhole from water, grime and dirt• Includes two keys Internal O-ring & watertight cap seal out moisture Made of 100% stainless steel Includes 2 round keys with easy 1/4 turn lock & unlock | Trimax Universal Stainless Steel Receiver Lock, Fits 1/2" and 5/8" with Sleeve