A na-ejikarị ngwa nzacha ihe nzacha mmanụ nchara dochie ihe nzacha mmanụ n'igwe ụgbọ ala. Ngwa a na-agụnyekarị wrench ahaziri ahazi nke enwere ike iji wepụ ma tinye nzacha mmanụ. Ihe nchara na-eme ka mgbanaka ahụ sie ike ma na-adịgide adịgide iji nagide eziokwu ahụ bụ na nzacha mmanụ na-achọkarị ike ịtụgharị. A na-ahazi ngwa ngwa ndị a nke ọma ka ọ dabara nha dị iche iche na ụdị nzacha mmanụ, na-eme ka nzacha na-agbanwe ngwa ngwa na ngwa ngwa.
Akụkụ nke ngwa nzacha mmanụ nchara na-agụnyekarị: