Apex HE-2-3-V2 Trailer Hitch Adapter with Anti-Tilt Bolt ,1 Pack Converts a 1-1/4" Class I or II trailer hitch to 2" Class III or IV Extends hitch length by 7.125" for added clearance Includes anti-tilt locking bolt on 2" end Maximum 350 lb. tongue weight - Not designed for towing Heavy duty steel construction