The Felo 438 is a professional-grade bit holder screwdriver with a 1/4" F hex socket and 100 mm shaft length, featuring Felo's 3-component Ergonic handle for superior comfort and grip control during extended use. The precision-engineered design minimizes hand fatigue and provides excellent torque transfer, making it essential for electricians, panel builders, and precision assembly work. Ideal for both daily maintenance and demanding industrial applications where reliability and ergonomic performance are non-negotiable.