SL-4 Heavy Duty Trailer Hitch Lock "MADE IN THE USA" WE BUILD THE LOCK FOR YOUR COUPLER FULL SITE INFORMATOIN www.amazon.com/shops/HitchItSafeLLC Designed Exclusively for 2-5/16" UPC Coupler Made In The USA Less than 1/8" Clearance 2-5/16" Ball Welded in Place Laser Cut 1/4" Material "Cold Drawn Forming" Stainless Steel Shackle Lock Included