

I don't own any of those screwdrivers but if I would think (key word) that if the shaft and tip were made out of CV steel or tool steel they would hold up pretty good.
If you had a few more dollars to spend this Williams set is top notch:
http://www.ebay.com/itm/JH-WILLIAMS...S_Srewdrivers_Nut_Drivers&hash=item414bbbfa28
Just my two cents this early morning day![]()