Hoʻohana nui ʻia nā pahu kila kalapona wela, e like me 15 #, 20 #, 35 #, 45 #, 50 #, 55 #, a me 60 #, i nā ʻoihana like ʻole ma muli o kā lākou mau waiwai mechanical maikaʻi loa a me ka versatility. Hōʻike maʻamau kēia mau helu i ka maʻi kalapona a i ʻole nā mea kikoʻī ʻē aʻe o ke kila, a pili pinepine lākou me nā māka kila Kina.
Ua ʻike ʻia kēia mau pahu kila kalapona wela no ko lākou ikaika kiʻekiʻe, ka machinability maikaʻi, a me ka weldability, e kūpono ana iā lākou no nā noi e like me nā shafts, axles, gears, a me nā mea mīkini ʻē aʻe. Hoʻohana pinepine ʻia lākou i ke kūkulu ʻana i nā ʻāpana kaʻa, nā mea mahiʻai, a me nā ʻāpana ʻenekinia maʻamau.