For improved safety, each screwdriver is tested individually at 10,000 Volt for 10 seconds VDE approved. Slim Profile gives 27% more reach - SHOW ICON. Inline Hardening Process – +100% Tip Life and +100% Bar Strength. Handle Material - Softer for more Comfort and still Chemical Resistant. Handle ‘Channel’ - +10% Torque. Laser Marking - gives virtually Permanent Marking. CNC tip machining - gives better Screw Fit increasing Torque Transfer and Reducing Wear.