- Flexible and practical: This 11-piece wrench set features crowfoot open-end wrenches in sizes from 10 mm to 22 mm, offering versatility for a range of fastener needs. The compact design allows easy access to fasteners in tight spaces where other wrenches may not reach. Compatible with any 3/8 inch drive ratchet, extension, or torque wrench for flexible tool selection. - Reliable: Made from durable materials, this wrench set is built to withstand heavy use and resist wear and slipping. The special heat treatment improves torsion and hardness, ensuring long-term durability and reliability for both production/processing settings and automotive repair. - Replaceable and efficient: The movable open-ratchet head design enables quick and simple head replacement. Interchangeable heads cover the full metric range from 10 mm to 22 mm, allowing efficient and precise fastening or loosening of screws. Time- and effort-saving with a practical, efficient design. - Stable storage rack: Includes a convenient storage rack to keep the set organized and accessible. The rack enables easy identification and access to each wrench, promoting a tidy workspace and reducing loss or misplacement of tools. - Use scenarios: Automotive repair in cramped engine bays or underbody areas where space is limited; machinery maintenance and production-line assembly requiring quick tool changes; bicycle maintenance and home projects that need reliable metric range (10–22 mm) with a compact, organized toolkit.