For those requiring a more extensive set, the Ko-ken 3286Z 3/8" Sq. Dr. 21-Piece Z-Series 6-Point Metric Socket Set is a high-quality, versatile toolset designed for precision and durability. It includes 3400MZ 6-point sockets in a comprehensive range of sizes (7, 8, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 21, 22 mm), as well as 3760Z extension bars in lengths of 75, 125, and 250 mm to reach tight spaces. The set also features a 72-tooth flex-head ratchet for smooth operation, a universal joint for flexible access, and a quick spinner for fast manual adjustments. All these components are neatly organized in a durable and attractive metal case, making it a reliable choice for professionals and serious enthusiasts alike.