Amasuntswana okomba angenamngxunya akwabizwa ngokuba ngamasuntswana okomba angundoqo, izivula-mngxunya, amasuntswana okomba aseziko, amasuntswana okubhola epleyiti yentsimbi, amasuntswana okomba wemagnethi, amasuntswana okomba kaloliwe, njl.
Izinto eziphambili ze-drill bits zi: isinyithi esinesantya esiphezulu;i-metallurgy yomgubo;i-carbide enesamente.
Amasuntswana e-drill anomngxuma anoluhlu olupheleleyo lweentlobo kunye neenkcukacha kwaye zifanelekile kwiimpawu ezahlukeneyo ze-drill yesihlalo somagnetic (i-magnetic drills) kunye noomatshini bokomba jikelele, oomatshini bokugaya, oomatshini abadikayo, njl. i-drill, kunye nokusebenza kakuhle kokugrumba kukuphindaphinda isi-8 ukuya kwali-10 kunamasuntswana aqhelekileyo okomba.