Mtedza wa cap ndi chitsulo chosapanga dzimbiri chotchinga cha hexagon chili ndi pini yogawanika, yomwe imalumikizidwa ndi screw yokhala ndi bolt.Amagwiritsidwa ntchito polimbana ndi kugwedezeka ndi kusinthana katundu, ndipo amatha kulepheretsa mtedza kumasuka ndi kutuluka.