Roll nika ƙafafun da aka yafi amfani a cikin karfe masana'antu don nika bakin ciki karfe faranti, matsakaici-kauri karfe faranti, da zafi da sanyi yi nadi goyon baya. Kuma dace da nika na zafi-birgima karfe faranti, sanyi-birgima karfe faranti, silicon karfe faranti, matsakaici-kauri faranti, ci gaba da simintin gyaran kafa da mirgina, da kuma non-ferrous karfe farantin sarrafa Rolls.