Misomali ndi misomali ya mitu iwiri yomwe ili ndi nsonga zakuthwa kumbali zonse ziwiri.Izi zimapangitsa kukhala chomangira choyenera cha ntchito zosiyanasiyana.Mbali imodzi ya msomali nthawi zambiri imagwiritsidwa ntchito kusunga zinthu, pomwe mbali inayo imasiyidwa kuti ichotsedwe mosavuta kapena kuyiyikanso.Kapangidwe kameneka kamalola kuyika kwachangu komanso kosavuta, komanso kusinthasintha kosintha kwa workpiece.

Ubwino umodzi waukulu wogwiritsa ntchito ma staples awiri ndi mphamvu zawo zogwirira ntchito zapamwamba.Kukonzekera kwapawiri kumapereka chitetezo chowonjezera, chomwe chimapangitsa kuti zikhale zogwira mtima kwambiri pa ntchito zomwe zimafuna njira yokhazikika yolimba komanso yodalirika.Kaya mukugwira ntchito yomanga, yokhotakhota, kapena mtundu wina uliwonse wa ntchito yomanga, misomali ya duplex ili ndi ntchitoyo.

Kuphatikiza pa mphamvu zawo, misomali ya duplex imadziwikanso chifukwa chosavuta kugwiritsa ntchito.Mitu iwiriyi imathandizira kukhazikitsa kosavuta komanso kosavuta ngakhale m'malo ovuta kufikako.Izi zimakupulumutsirani nthawi ndi mphamvu kuntchito, zomwe zimathandizira kuwonjezera mphamvu ndi zokolola.