Mapangidwe ophatikizika, taper shank ndi kubowola chuck ndizophatikizika, mawonekedwe ophatikizika, amachotsa kulolerana komwe kumapezeka, kulondola kwambiri.
Masulani ndi chepetsani ndi dzanja, zosavuta komanso mwachangu, ndikupulumutsa nthawi yokhomerera
Kudzikhoma kwa ratchet, kubowola ndi kugogoda kungagwiritsidwe ntchito
Kapangidwe ka giya, mphamvu yothina yolimba, palibe kutsetsereka mukamagwira ntchito
Amagwiritsidwa ntchito pobowola benchi, makina obowola ma radial mkono, kubowola ndi kugogoda, makina opangira mphero, kubowola maginito; etc.
