Zund blade Z31 ikozwe muri ultra-nziza ya tungsten yifu yicyuma. Icyuma cya Tungsten (alloy alloy) gifite urukurikirane rwibintu byiza cyane nko gukomera cyane, kwambara birwanya, imbaraga no gukomera, kurwanya ubushyuhe no kurwanya ruswa, cyane cyane ubukana bwayo bukabije no kwambara. Carbide ikoreshwa cyane nkibikoresho, nkibikoresho byo guhindura, gukata urusyo, abapanga, imyitozo, ibikoresho birambirana, nibindi, Umuvuduko wo kugabanya karbide nshya ya sima ubu wikubye inshuro magana ijana icyuma cya karubone.