Magnetic Nut Setters are made from proprietary steel, heat-treated to control hardness. The nut setters each have a quick-release hex shank for setting a variety of screws swiftly. These nut setters are created for heavy-duty impact applications. They are used in most quick-release impact drivers like a power hand drill. This tool is designed to tighten or loosen the nuts and bolts in combination with power screwdrivers. Each magnetic nut setter has a strong magnetic tip for a secure grip and unyielding bit engagement.