The Ko-ken SKU 4275 is a 24-piece 1/2" Sq. Dr. 6-point socket set. It includes 4400M 6-point sockets in sizes 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, 16mm, 17mm, 18mm, 19mm, 21mm, 22mm, and 24mm; two 6-point clip-type spark plug sockets in sizes 16mm and 20.8mm; and 4300M wheel nut sockets in sizes 17mm, 19mm, and 21mm. The set also features a reversible ratchet (SKU 4750N), extension bars in 125mm and 250mm lengths, a 380mm breaker bar (SKU 4768N-380), a universal joint (SKU 4770), and a T-handle (SKU 4785). All tools are organized in a blow-molded insert within a red metal case for efficient storage and transport.