Umqheba owenziwe ngu-L wenza ukuba i-wrench ibe lula ukuyibamba nokusebenza, ibonelela ngokugqithiswa kwamandla amakhulu. Nokuba kukuqiniswa okanye ukukhulula izikrufu, izikrweqe zebhola ezimile okwe-L zinokumelana ngokulula neemeko ezahlukeneyo zomsebenzi.
Isiphelo sombhobho webhola sinokujikelezwa kwii-angles ezininzi, kukunika ukuguquguquka ngakumbi ukulungisa indawo ye-wrench ukulungiselela ii-angles ezahlukeneyo kunye nezikrini ezinzima ukufikelela kuzo. Olu luyilo lunokuphucula ukusebenza kakuhle kunye nokunciphisa umsebenzi onzima.