Painted, coated or corroded fasteners can present a special problem when selected the appropriate drill bit. Zephyr ACR power drive bits feature special wing-face ribs to grip screw recesses and reduce stripping and cam-out which can result in damage to the surrounding workpiece. Zephyr power drive bits include reduced nose dry wall bits, milled point bits, aircraft or machine screw bits and industrial or self tapping screw bits. Each tool is manufactured to the tightest tolerances in the industry, most are even tighter than licensing agreement requirements.