Sinokubonelela ngeJuntai okanye iinxalenye zokuqala ze-rock drill.Kungakhathaliseki ukuba ukhetha luphi uhlobo lwe-brand, akufanele ukhathazeke malunga nokungahambelani phakathi kweebrendi ezahlukeneyo, oko kuthetha ukuba imveliso yokuqala ye-rock drill inokugcinwa emva kokugcinwa.