Slim profile gives 27% more reach. For improved safety, each screwdriver is tested individually at 10,000 Volt for 10 seconds VDE approved. 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.