Trailer Hitch Coupler manufactured by Curt. This Bolt On trailer coupler uses the 1 7/8" Trailer Ball Size and has a towing capacity of 2,000 lbs. Each of these couplers features a specific width, to be mount to your trailer tongue that matches that width. This Item mounts on 3 inch wide trailer tongues. You will mount this with (2) 3/8" Trailer Bolts. This may require drilling, depending upon your specific needs. This Coupler features the most popular securing style, the Lever Lock. A great feature of this design is its ability to be locked with the most common and available types of Coupler Locks.