Connor Towing 1615120- 1/2" and 5/8" Sleeve Receiver Lock for Class I, II, III, IV Chrome Fits ALL Class I/II 1-1/4 in. x 1-1/4 in. & Class III/IV 2 in. x 2 in. receivers (1/2" & 5/8" pin) Engineered to increase durability and strength 3 in. usable length Includes 2 keys & plastic key slot cap Chrome Finish- For replacement keys please contact us through Amazon or via email