Each model of the B&W Biker Bar Motorcycle Tie-Down System for Trailers will use two anchor plates # BWMC2305 to connect to. The anchors would be secured to the underbelly of the trailer making it hard to use in multiple locations, so you'd really need to buy a set for each trailer you plan to haul with. The base bolts down to the anchors so if you really wanted to you can remove it from the anchors but this would also be somewhat of a hassle. view full answer...