The Ko-ken RS3441M/5 3/8" Square Drive Universal 6-Point NUT GRIP® Socket Set is a 5-piece collection designed for secure fastening of non-magnetic nuts and bolts. This set includes NUT GRIP® sockets in sizes 8mm, 10mm, 12mm, 13mm, and 14mm, all mounted on a 150mm rail for convenient organization and accessibility. The innovative NUT GRIP® design features two balls held in place by a spring steel ring, allowing the sockets to firmly hold fasteners without the use of magnets. When a nut or bolt is inserted, the ball bearings push out on the springs, securely gripping the fastener. Engineered for durability and efficiency, this NUT GRIP® socket set is an invaluable addition to any professional toolbox, ensuring reliable performance and ease of use in your fastening tasks.