For years anglers have struggled along shingle beaches with boxes slung across one shoulder either slipping and sliding or slowly strangling there owner. Once you have arrived at your peg the best you have got is an uncomfortable box to sit on. The Breakaway Backrest conversion fits onto the Shakespere boxes and is the best one for the job is the smaller Beta box but will fit the larger model as well but the bigger the box the more you will fill it and the heavier it gets. Once fitted those long walks will be a pleasure as the carrying harnes will hold the box onto the middle of your back and distribute the weight evenly leaving your hands free to carry your fish and other tackle. IF YOU HAVE A NEW SHAKESPERE BOX YOU NEED AN SB2