Reese Towpower 7030600 Professional 5/8" Chrome Receiver Lock and Coupler Lock Includes 7030200 receiver lock and 7030500 coupler lock keyed alike Chrome plated steel construction with rubber cap and o-rings for ultimate weather resistance The square key design offers the ultimate theft protection with thousands of key codes and is virtually impossible to pick Patented ball bearing locking system eliminates weak point Reese Towpower Professional lock have a limited one year warranty