The Ko-ken RS4405M/10 1/2" Square Drive Socket Set features ten 12-point sockets ranging from 10mm to 22mm, all organized on a sturdy 300mm rail for easy access and storage. This set includes sockets in the following sizes: 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, 17mm, 19mm, 21mm, and 22mm. Designed for durability and efficiency, the 12-point configuration allows for a secure grip and optimal torque application, making it suitable for a variety of fastening and loosening tasks. The included rail enhances organization, ensuring that your tools are always at your fingertips for quick and efficient use.