The Klein Tools 39-pc KNECT Complete Impact Pass Through and Flip Socket Set, No. 65500KNECT, includes SAE and metric sockets, screwdriver bits, adapters, and a 90-tooth pass-through ratchet requiring 4 degrees of swing. The set includes socket sizes from 1/4" to 3/4" and 8 mm to 18 mm, along with Phillips, TORX, and slotted bits. A cushion-grip pass-through handle accepts KNECT sockets and adapters. The included adapters allow compatibility with standard 1/4", 3/8", and 1/2" drive sockets. The components are stored in a compact, stackable case with a clear lid.