CURT 60619 Double Lock EZr Gooseneck Hitch with Flip and Store Ball, 30,000 lbs., 2 5 16 Inch Ball lunette CURT dual length ball mounts Size:5 on 4.5" CURT dual length ball mounts are made with quality steel and are robotically welded for precision ball capacity Fits trailer hitches with a 2" x 2" receiver tube opening Couples to 2" couplers or lunette rings with a 2 1 2" or 3" inside diameter Cast iron construction is austempered for superior strength and wear resistance Textured One person installation requires no welding or truck bed removal Center locator eliminates the need to measure where the ball hole should be Double locking pins for superior trailer and trailer ball security Flip and store ball keeps truck bed free of obstructions Removable chrome plated 2 5 16" trailer ball fits most gooseneck trailers Slotted safety chain holes allow for proper alignment with truck bed rails Chrome plated trim ring provides a finished look Rubber hole cover helps prevent corrosion in trailer ball hole Heavy duty 3 8" diameter handle for solid operation Includes strong 5 8" safety chain loops and grade 8 hardware Protected by a highly durable carbide powder coat finish Tested for safety in accordance with SAE J2638 Limited lifetime warranty (one year finish patented center locator to eliminate the need for meticulous measuring and ensure error free drilling