Wrench ya njira zinayi, yomwe imadziwikanso kuti "four-way wheel wrench" kapena Phillips spoke wrench, ndi chida chamitundumitundu chomwe chimagwiritsidwa ntchito pochotsa mtedza pamawilo. Nthawi zambiri imakhala ndi mapangidwe anjira zinayi okhala ndi masikelo anayi a socket mutu kumapeto kulikonse kuti athe kutengera kukula kwa mtedza womwe umapezeka pamagalimoto.
Amapangidwa kuti apereke njira yachangu komanso yothandiza yochotsera kapena kumangitsa mtedza pamagudumu, wrench yanjira zinayi imagwiritsidwa ntchito posintha matayala kapena ntchito zina zokonza magalimoto. Miyezo yosiyana ya socket pa wrenches imalola ogwiritsa ntchito kuti azigwira ntchito mosavuta ndi mtedza wosiyanasiyana popanda kusinthana pakati pa zida zingapo.
Ma wrenches awa nthawi zambiri amapangidwa kuchokera ku zinthu zolimba, monga chitsulo kapena chrome vanadium, kuonetsetsa mphamvu ndi kulimba kuti zigwiritsidwe ntchito mobwerezabwereza. Ndizimodzi mwa zida zomwe muyenera kukhala nazo kwa okonda magalimoto, akatswiri amakanika, ndi omwe akufunika kukonza magalimoto.
Wrench wanjira zinayi ali ndi izi:
Ponseponse, wrench ya 4-way ndi chida champhamvu, chosavuta komanso chothandiza chamitundu yambiri ya mtedza, yokhazikika komanso yogwiritsidwa ntchito mosiyanasiyana.