Amazon.com: BRCOVAN Aluminum Alloy Mount Base with 1'' TPU Ball & 10mm Mounting Hole, Angled Bolt Head Adapter Ball Base Compatible with RAM Mounts B Size 1 Inch Ball Double Socket Arm :
Weigh Safe Trailer Hitch Ball Mounts WS6-2-03
Ball Mount – X-POLE
Reese Towpower Adjustable Ball Mount | Canadian Tire