Dontho la dzanja limapangidwa kuti lizigwira ntchito ndi zigawenga ziwiri wamba, zomwe ndi 11mm ndi 20mm. Malize awa amafanana ndi mainchesi a zikopa za Crimp, zomwe zikuwonetsa kugwirizana kwawo ndi mitundu ina ya vial. Chida ichi chimapangidwa ndi zida zolimba monga chitsulo chosapanga chopanda chonyowa kapena champhamvu kwambiri. Zipangizozi zimasankhidwa chifukwa cha mphamvu zawo ndikulimbana ndi kutukuka, kuwonetsetsa kuchitapo kanthu kosatha. Kuwonongeka kumakhala chogwirizira, chomwe nthawi zambiri chimapangidwa ndi malingaliro a ergonimic kuti agwiritse ntchito moyenera ndi ogwira ntchito a labotale. Chochitacho chimapereka chiwongolero chokhazikika pakuwongolera munthawi yovuta.
