Li-drill bits ke lisebelisoa tse sebelisoang haholo ho aha, ho etsa le ho lokisa, 'me meralo le thepa ea tsona e fapana ho latela ts'ebeliso ea tsona.Mosebetsi oa karolo ea ho phunya ke ho phunya masoba ka har'a lisebelisoa tse thata tse fapaneng tse kang lehong, tšepe, lejoe le konkreite.