Kufotokozera Kwachidule:

Mphepete yakunja kwa mutu wa screw wa hexagon socket head bolt ndi yozungulira, ndipo pakati ndi concave hexagonal, pomwe bolt hexagonal ndiyomwe imakhala ndi mitu yowonekera kwambiri yokhala ndi mbali zazing'ono. Pambuyo otentha galvanizing pamwamba chithandizo, zotsatira odana ndi dzimbiri zimatheka.