Zotsatizanazi zimayendetsedwa ndi screw, zotsekedwa kwathunthu, zazing'ono, zopepuka komanso zolimba kwambiri. Gawoli lili ndi gawo la oyendetsa mipira yoyendetsedwa ndi injini yokhala ndi chivundikiro chachitsulo chosapanga dzimbiri kuti tinthu ting'onoting'ono zisalowe kapena kutuluka.