Knuckle ndiyo hinge inotenderedzwa vhiri, kazhinji yakaita seforogo. Maforogo ekumusoro neazasi ane maburi maviri ehoming ye kingpin, uye knuckle magazine inoshandiswa kukwirisa vhiri. Iwo mabhegi maviri emaburi epini mubato rekufambisa akabatana nechikamu chakaita chibhakera kumigumo ese esero yekumberi kuburikidza nemambo, zvichibvumira vhiri remberi kutsausa kingpin paAngle kutungamira mota. Kuti uderedze kusakara, bhuronzi yebhuronzi inotsikirirwa mugomba repini yepini, uye kudzora kwebhushi kunozorwa negirisi inoiswa mumuromo wakaiswa pagumbo. Kuti uite kuti chidhiraivho chigadzirike, mabhengi anorongedzerwa pakati pegumbo rezasi regiredhi rekutungamira uye chikamu chechibhakera chemberi. Gasket rekugadzirisa rinopihwawo pakati kwenzeve uye chibhakera chikamu chegiya rekutungamirira kugadzirisa mukaha pakati pavo.
