Babban ginin simintin gyare-gyaren ƙarfe mai ƙarfi wanda ya saba da murdiya.Haƙuri (Flat da Square): Machined Gama - tsakanin .002 ″ da 6 ″.Ƙarshen Ƙasa - tsakanin .0005 ″ da 6 ″ akan farfajiyar aiki.Dukkanin ƙarewa da aka yi da murabba'i da layi ɗaya a cikin .002″ kowane 6″.