1. Mgbe a na-egwe nri conical, enwere ike ịgbanye tebụl ahụ n'akụkụ ọ bụla ma debe ya kpọmkwem site na iji ọnụ ọgụgụ.
2.Ihe nkiri mmanụ dị n'etiti ihe na-ebu na spindle na-edobe mkpọtụ ka ọ bụrụ ọkwa kacha nta, ya mere na-enweta nsonaazụ pụtara ìhè yana izi ezi kachasị.
3.Isi mkpịsị mkpịsị kwụ ọtọ na isi egweri siri ike na-ekwe nkwa nsonaazụ pụrụ iche n'ụdị ọrụ ọ bụla.
4. Nkwalite siri ike na ogwe ndị a haziri nke ọma nke isi igwe na-eme ka ọ na-eguzogide mgbanwe okpomọkụ na nrụrụ.
5. A na-agbanye spindle site n'akụkụ abụọ ma nwee njiri ngbanwe nke nwere akụkụ atọ.