Urunigi rw'icyuma rutwara ibyuma rukoreshwa mugukaraba-kimwe n'ibiribwa-urwego, ubushyuhe bwo hejuru, hamwe no gukoresha nabi.Ubusanzwe itangwa mubyiciro 304-byuma bidafite ingese kubera imiterere yubukanishi, ariko 316-nayo iraboneka ubisabwe.Dufite ububiko bwa ANSI bwemewe, ISO bwemewe, na DIN yemejwe numuyoboro wogukwirakwiza ibyuma.