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 plate
• Patented, pick-proof screw and lock security
• Flush locking design
• Made in the USA