The 3/8 Sq. Dr. 9 Piece Z-Series 6-Point Metric Socket Set is a compact and efficient toolset ideal for various mechanical tasks. It includes essential socket sizes (8, 10, 12, 13, 14, 17, 19 mm), each designed for optimal grip and durability. The set features a quick spinner, also known as a thumb spinner, for swift manual adjustments, and a 72-tooth ratchet, providing smooth and precise operation with minimal movement. All components, including the quick spinner and sockets, are conveniently organized on a durable Z-Series metal rail, ensuring easy access and secure storage. This set is perfect for both professional mechanics and DIY enthusiasts.

Ko-ken 72 Tooth Ratchets – Precision, Strength, and Control

Ko-ken ratchets are renowned for their precision engineering, delivering exceptionally low backlash, compact head sizes, and high torque performance. The newly designed 72 tooth ratchet continues this legacy, combining our hallmark features with refined advancements.

Featuring a patented dual pawl mechanism with a single spring, this ratchet provides a smooth 5° arc swing, allowing for superior control in tight spaces. The innovative design increases surface area contact within the gear, resulting in a 10% higher torque limit while preserving Ko-ken’s signature low-torque backlash performance.

After four years of intensive development and testing, we’ve optimized the spring pressure to maintain a consistent, precise feel with minimal resistance—perfect for professional users demanding accuracy and durability.