Complete Size Range: Includes 10 pieces in sizes 3, 3.5, 4, 4.5, 5, 5.5, 6, 7, 8, and 9mm for versatile fastening applications Durable Chrome Plating: Premium chrome plated construction provides smooth operation and long-lasting corrosion resistance Ergonomic Handle Design: Anti-slip handle features a convenient hanging hole for easy storage and organization Portable Storage Solution: Comes with a packing bag for easy carrying, storage, and protection of your tools Versatile Applications: Widely used in household DIY projects, auto parts maintenance, woodworking, and professional machine repairing High-Quality Material: Made from chrome vanadium steel with hardness rating of HRC52-54 for superior durability and performance Precision Engineering: Precisely-sized, chamfered ends insert smoothly into fastener heads, reducing wear and extending tool life, Manufacturer: TOOLSTAR