Coupler lock for lever style trailer couplers requiring a span (e.g. Shelby, Fulton, Dutton-Lainson). Locks trailer to hitch ball when in use. Helps prevent attaching to an unattended trailer. Coupler Lock with housing and knob cones for flush locking design, Pin Diameter: 1/4, Inside Width: 1/2, Overall Length: 4-1/8. Product Features:Double nickel chrome platePatented, pick-proof screw and lock securityFlush locking designMade in the USA
