Li-vael tsa screw-holimo le li-cap li bonolo ho li sebelisa, 'me li hloka lisebelisoa tse khethehileng. Moralo o ikhethang o ikhethang o fana ka tiiso e bolokehileng ka mehla, e thibelang ho fetoha mouoane. Li-vaerase tsa khoele li fumaneha ka 8-425 (8mm), 9-425 (9mm), 10-225 (10mm) le 13.4mm). Empa e sebelisoa hangata haholo ke valc e sa tloaelehang.