Bukatun buga jakar hannu ba a tsara su ba, shine zaɓin samfurin, sau da yawa bisa ga buƙatun abokin ciniki, haɗin kayayyaki ko al'adun kamfanin, wasu na iya zama samfurin da abokin ciniki ke buƙata. Don saitin hannu jakar size bayanai, kuma babu wani takamaiman amfani da ka'idoji, saboda abubuwa da aka yi amfani da su a rayuwarmu girman girman ne akwai babban bambanci, don haka hannu jakar lokacin buga girman bukatar daidai da kyauta girman da kuma abokin ciniki bukatun da aka tsara. Kuma yawanci don yin kunshin ana barin shi a waje.

Lokacin tsara jakar hannu dole ne a karfafa ikon riƙewar hannu don hana lalacewa a lokacin amfani.