Cov yeeb nkab stainless hlau yog ib hom hollow ntev round steel, uas yog siv cov roj av kev lag luam, kev lag luam, khoom siv lub teeb, cov khoom siv tshuab kev kho tshuab thiab lwm yam. Tsis tas li ntawd, thaum lub zog khoov thiab torsional zoo ib yam, qhov hnyav yog sib dua, yog li nws kuj tau siv dav hauv kev tsim khoom ntawm cov khoom siv tshuab thiab cov qauv engineering.