This Reese Towpower elite receiver lock helps deter theft and includes a sleek, black nickel sleeve to convert from 1/2" to 5/8" diameter pin. The black nickel coating provides enhanced corrosion protection. The lock features a push-button lock mechanism that allows ease of use. Lock tumbler includes a dust cover to prevent debris and dirt from entering the key slot, keeping it clean and ensuring a longer life. For use on Class I/II or III/IV receivers.