A matsayin na'urar mataki daya, zai zama aikace-aikacen da ya dace da fission mai ƙarfi. Ya fara zama mai amfani lokacin da aka haɗa shi a cikin na biyu na makamin nukiliya mai tsaka-tsaki biyu. Sunan Amurka, Alarm Clock, ya fito ne daga Teller: ya kira shi saboda yana iya "farka duniya" ga yiwuwar yiwuwar Super. Sunan Rasha don wannan ƙirar ya fi bayani: Sloika (Rasha: Слойка), kek mai ɗawainiya. An gwada Sloika mai tsaka-tsaki a ranar 12, 1953.
6.9 megatons