Muaj kev lom zem yog ua tiav nrog nias lossis nrog hammers powered by compressed huab cua, hluav taws xob, cov hluav taws xob lossis chav. Cov rauj no yuav muaj qhov hnyav reciprocating nyob rau ntau txhiab tus phaus. Cov hluav taws xob me me rauj, 500 lb (230 kg) lossis tsawg dua rececocating hnyav, thiab hydraulic yog muaj nyob rau hauv kev kos duab smithies ib yam nkaus. Qee lub Hammers chav nyob twj, tab sis lawv tau dhau los ua ib qho muaj ntawm lwm qhov, ntau dua, muaj hwj chim.