The Ko-ken RS3300XA/9 is a 9-piece 3/8″ square drive semi-deep chrome SAE socket set with 6-point openings for a strong grip on fasteners. It includes sizes ranging from 1/4″ to 3/4″, specifically 1/4″, 5/16″, 3/8″, 7/16″, 1/2″, 9/16″, 5/8″, 11/16″, and 3/4″. Each socket is mounted on a 200mm rail, ensuring organized storage and easy access. This set is designed for durability and efficiency in a variety of mechanical tasks.