Ukuze uthole ukujula kwedwala okungamamitha angu-0-5, ungakhetha i-air-leg drill ukuze usebenze nge-compressor yomoya encane ngaphansi kwe-8bar. Ukubhola kwamadwala kusetshenziswa kakhulu ekwakhiweni komhubhe, ukwakhiwa kwemigwaqo yasemadolobheni, izinkwali nezinye izimo zokusebenza ngenxa yokubumbana kwazo, ukuguquguquka kwazo, kanye nezindleko eziphansi. Sinezinhlobonhlobo zamamodeli wokubhola amadwala kanye nama-compressor omoya ahlukahlukene amakhasimende angakhetha kuwo. Ngesikhathi esifanayo, sihlinzeka ngezinduku zokubhola zekhwalithi ephezulu nezinkinobho ze-rock.