The Ko-ken RS4400M/10 1/2" Square Drive Socket Set features ten high-quality 6-point sockets sized 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, 17mm, 19mm, 21mm, and 22mm, all mounted on a durable 300mm rail for convenient storage and accessibility. Designed for exceptional performance, this set is ideal for a variety of fastening applications, providing a secure grip and reliable torque transfer. Whether you're a professional mechanic or a DIY enthusiast, the Ko-ken RS4400M/10 Socket Set is an essential tool for ensuring efficient and effective assembly and disassembly tasks.