Square bututu sunan ne ga square bututu, wato, karfe bututu tare da daidai gefen tsawon.An yi na birgima tsiri karfe bayan aiwatar jiyya.Canja zuwa bututu mai murabba'i: gabaɗaya, ƙwanƙarar tsiri ɗin ba a cika shi ba, an daidaita shi, an murƙushe shi da walda don samar da bututu mai zagaye, sannan a mirgina cikin bututu mai murabba'in daga bututun, sannan a yanke shi cikin tsayin da ake buƙata.