Li-drill bits li entsoe ka boholo ba metric ho tloha ho 6mm ho isa ho 25mm le bophara ba lisenthimithara ho tloha ho 1/4 ″ ho isa ho 1 ″.
Ha ho bapisoa le mefuta e meng ea li-drill bits, li-drill bits li ka nkoa li le telele haholo. Boroko bo bokhutšoane bo atisang ho fumanoa bo bolelele ba 200 mm (8 inches). E telele ka ho fetisisa ke 600mm, e leng lisenthimithara tse 24 kapa maoto a mabeli! Li ka sebelisoa habonolo ho phunya lithupeng tsa lebota, likutu kapa likotoana tse teteaneng tsa patsi.
Likotoana tsa ho cheka fatše le leqhoa li kholoanyane. Lichesele tse mahareng tsa mofuta ona hangata li na le bophara ba 150 mm (6 in) le 800 mm (31 in) bolelele.
Joalo ka mefuta e meng e mengata ea li-drill, li-drill bits li fumaneha ka mokhoa o "khutšoane" ka bolelele ba 100-120 mm (4-4¾ inches). Likotoana tsena tse khutšoane li bohlokoa bakeng sa ho cheka masoba libakeng tse thata, joalo ka ho etsa masoba maballong a marulelo.
