Ball Mount Conversion:. Converts ball mount to 2" square receiver. Rust-resistant, black powder-coated finish. Ground clearance not affected. QuadBoss Hitch Adaptor:. Converts 1-1/4" to popular 2" receiver opening. Rust-resistant, black powder-coated finish. QuadBoss Hitch Ball:. 1-7/8" replacement ball for QuadBoss Hitch.