Bisa ga siffar karfe mashaya za a iya raba tashar karfe, I-karfe, rebar, zagaye karfe, waya, square karfe, Angle karfe da sauran daban-daban iri.Daga cikin su, tashar karfe ya shahara da sashin giciye kamar tsagi, wanda ke da kyawawan kaddarorin injina da kayan walda da sauransu, kuma ana amfani da su sosai wajen ginin gine-gine da kayan aikin injina.Rebar surface ne jinjirin watan, karkace siffar, da dai sauransu, tare da babban ƙarfi, mai kyau taurin da sauran abũbuwan amfãni, ana amfani da ko'ina a gidaje, Bridges, hanyoyi da sauran farar hula injiniya.