Re etsa li-shafts tsa mochini o nepahetseng le lisebelisoa tsa cylindrical spur tse entsoeng ka polasetiki ea boleng bo holimo ea POM. E etselitsoe liindasteri tse kang tsa makoloi, liroboto le mechini ea indasteri, likarolo tsena li fana ka matla a ikhethang, ho tšoarella le ho hana ho apara.

Ka mekhoa e tsoetseng pele ea tlhahiso, re fana ka lihlahisoa tse entsoeng ka mokhoa o nepahetseng tse netefatsang ts'ebetso e ntle le phetisetso e nepahetseng ea matla. E ka khonahala ka botlalo ka boholo, moralo le litlhaloso, lithapo tsa rona tsa polasetiki tsa POM le likere li fihlela litlhoko tse nepahetseng tsa lits'ebetso tsa hau. Tšepa boitseanape ba rona ho fana ka litharollo tse tšepahalang, tse sebetsang hantle tse etselitsoeng ho phahamisa katleho ea mochini oa hau.