Wannan nau'in kwalabe na kwalabe guda biyu na ƙwanƙwasa capping na'ura ya haɗu da kwalban-in, hula-sorter, cap-lif, capping da kwalban-fita gaba ɗaya a cikin daya. Tsarin juyawa, kama murfi a cikin wani matsayi, tsayayye kuma abin dogara. Ba ya cutar da kwalba da murfi.