Nkeji a nwere chuck na kpatụ kollet.Chuck etinyela ngwaọrụ na-akwụ ụgwọ maka pitch thread.Enwere kọlụm mgbata abụọ dị iche iche, nke nwere oke nchekwa na nke enweghị.Mgbe ị na-eji kollet mgbata nwere oke ibu, ngwaọrụ nchebe nwere ike hapụ ya ozugbo ka ịzere nkwụsịtụ. Naanị gbanwee mkpụrụ ma ị nwere ike nweta ikike ntọhapụ dị iche iche ngwa ngwa na nke dabara adaba.