A high-ƙarfi aron kusa maki samar da mu masana'anta sun hada da metric 8.8, 10.9, 12.9, ASTM misali UNC Gr5, 8 maki. Kwayoyi masu ƙarfi sun haɗa da ma'auni 8 da 10, da ANSI misali 5 da G8 , duk waɗannan suna buƙatar maganin zafi.