Powerful Rotational Impacts Design: Delivers enhanced rotational torques, effectively loosening rusted or screws and nut that ordinary tools can ' t handle Premium Steel Construction: The screwdriver shaft is made from steel with excellent wear resistance and strength, ensuring long lasting even under heavy use 14 Piece Impacts Screwdriver Set: This comprehensive set includes 13 high carbon steel precisions short bits ( approx 37mm) for various screw types, providing versatile applications for different fastening needs Portable Storage Case Included: Comes with a dedicated storage case to keep all tools organized and protected, making it for professional to carry during mobile repairs or on site maintenance work Professional Disassembly Tool: Ideal for challenging repair jobs and DIYer projects, specially designed to tackle stubborn fasteners that resist conventional screwdrivers, Manufacturer: Oxxggkao