when looking for good technician tools , chek to make sure the are ISO CERTIFIED . tools that are iso certified , work the same on all screws and nuts .Wiha tools are iso certified , that is the brand i use . ISO was created , to prevent all the confusion in manufacturing and quality control , every iso certified company uses all the same quality standards ,and inspection processes . ISO WAS CREATED BY A GERMAN COMPANY USING GERMAN HIGH QUALITY STANDS . TECHMAN
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