4mm Wing-shank: Enhances grip and stability for precise fastening in confined areas. PH1 Phillips Head: Designed for optimal engagement with standard screws, minimizing slippage and cam-out. 3mm Diameter: Ideal for precision tasks requiring a compact bit size. 20mm Working Length: Facilitates detailed work in tight spaces while ensuring excellent control. 40mm Total Length: Provides extended reach for accessing deep-set fasteners with ease