Urunigi rwa SS ni pin idafite ibyuma bidafite ibyuma bikoreshwa mu bipimo by’Uburayi.Iminyururu ya pin roller itanga ibintu byinshi bitewe nubushobozi bwo kwinjiza inkoni zambukiranya urunigi nta gusenya urunigi bisabwa.Iyi SSchain yakozwe hifashishijwe ubuziranenge bwo hejuru, busobanutse, ibice kugirango birambe kandi ubuzima bwakazi.ikindi kintu kijyanye nuruhererekane nuko ikozwe mubyiza byo mu rwego rwo hejuru 304-ibyuma bitagira umwanda.Ibi bivuze ko urunigi rurwanya ruswa cyane, rutagira lube, kandi ruzakora mubushyuhe bwinshi.