Securely lock your ball mount into your trailer hitch with the CURT .625 in Hitch Lock. The barbell design hitch lock features a .625 inch diameter pin fits 2 inch x 2 inch receiver tubes. It is made of durable carbon steel and protected by a chrome-plated finish and has a watertight dust cap to prevent internal corrosion. CURT .625 in Hitch Lock - Trailer Parts And Accessories at Academy Sports