ATXR Series - Protwist Screwdrivers for Resistorx Screws are fully compliant with Resistorx screws. The ATXR series includes dual material handles with an ergonomic comfortable grip for heavy duty work. The dual material provides high resistance against shocks, chemicals, oil and hydrocarbons, while providing class-leading torque transfer.Features and Benefits Laser marking - gives virtually permanent marking Blade treatment - 4x corrosion resistance CNC tip machining - provides a better screw fit, while reducing wear Inline hardening process - +100% bar strength and tip life over other models