FB Series shoulder Latsa yi amfani da kushin baya tare da daidaitacce wurin zama don mafi kyawun daidaita gangar jikin yayin daidaitawa ga masu amfani masu girma dabam. Latsa kafada yana ɗaya daga cikin mafi kyawun motsa jiki don ƙarfafa kafadu da babba baya. Babban mai ba da taimako na latsa kafada shine sashin gaba na tsokar kafada (na baya deltoid) amma kuma zakuyi aiki da deltoids, triceps, trapezius da pecs.