From the Manufacturer
Felo 2-component Screwdriver handles are ergonomically designed for fatigue-free operation. This handle features full surface coated soft-component for highest torque transmission. Blades made of chrome-molybdenum-vanadium steel, reaching hardness up to 61 Rockwell. The handle is smooth and seamless for maximum comfort, and has a hanging hole for easy storage or inserting lever. Set includes sizes 3.5mm Slotted, 4mm Slotted, 5.5mm Slotted, 6.5mm Slotted, Phillips #1, and Phillips #2.