This socket and wrench set contains 17 sockets in varying sizes, 2 socket adaptors, an extension bar and a pass thru handle The Makita B-65604 is a 21 piece socket set containing 17 sockets, 2 socket adaptors, an extension bar and a pass thru handle. The ratchet has a 50% thinner head profile than conventional ratchet systems and is up to 40% stronger than traditional ratchets. Features: Up to 50% thinner head profile than conventional ratchet systems Up to 40% stronger than traditional ratchets by eliminating drive tang  5 Degree ratcheting arc One-touch release for 11 locking positions Pass-thru ratchet & socket system allows you to fasten nuts on threaded rods Contains: Socket Sizes: 10, 11, 12, 13, 14, 15, 16, 17, 18, 19mm, 3/8\", 7/16\", 1/2\", 9/16\" 5/8\", 11/16\", 3/4\" Socket Adapters: 1/4\" & 3/8\" Extension Bar: 75mm Pass Thru Handle (Straight) Specification: Pack Qty: 21 piece