The Weller Xcelite XST100N is a precision Phillips screwdriver with a blade length of 2 inches (50.8 mm), ideal for fine assembly and electronics applications. Its Super-Tru Tip tip is black oxide coated for optimum fitting accuracy, while the nickel-plated blade offers corrosion resistance. With an overall length of 4 5/8 inches (117.6 mm) and a round shank diameter of 1/8 inch (3.2 mm), the tool fits comfortably in the hand for precise work.