Stud, e tsejoang hape ka hore ke li-screw kapa li-studs tse nang le lihlooho tse peli. E sebelisoa bakeng sa ts'ebetso e tsitsitseng ea mochine o kopanyang, liboutu tse peli tsa hlooho li na le likhoele mahlakoreng ka bobeli, 'me sekoti se bohareng se fumaneha ka boholo bo boholo le bo tšesaane. Ka kakaretso e sebelisoa mechini ea merafo, marokho, likoloi, lithuthuthu, meaho ea tšepe ea boiler, litora tse emisitsoeng, meaho ea tšepe e telele, le meaho e meholo.