Premium-grade heavy duty sockets for tamper-proof TORX - star fasteners * Heat-treated and hardened Chrome Vanadium steel to resist stripping, cam-out * Includes chrome steel clip racks to keep organized in tool box or mount on workbench * 1/4" drive: T-10, T-15, T-20, T-25, T-27 and T-30; includes 3/8" to 1/4" adapter * 3/8" drive: T-40, T-45, T-47, T-50, T-55 and T-60; Manufacturer"s Lifetime Warranty