O le Zund blade Z31 e faia i le paʻu uʻamea sili ona lelei.Tungsten uʻamea (faiga faʻamalosi) o loʻo i ai se faʻasologa o mea sili ona lelei e pei o le maualuga o le maaa, faʻafefeteina, malosi ma le faʻamalosi, faʻafefe vevela ma faʻamaʻi faʻafefe, aemaise lava lona malosi maualuga ma le ofuina.Carbide o loʻo faʻaaogaina lautele e fai ma meafaitino, e pei o le liliuina o mea faigaluega, milling cutters, planers, drills, boring tools, etc., O le saoasaoa o le tipiina o carbides sima fou ua tele selau taimi o le carbon steel.