This 61-piece 3/8" Ratchet and Socket kit is a great choice for keeping in your vehicle. You get the Sonic Tools ratchet as well as shallow flank drive sockets from 6mm to 24mm. Furthermore, this kit includes deep-well sockets from 8mm to 19mm, with a 16mm and 21mm spark-plug socket thrown in. Sonic ratchets and sockets are made from Chrome-Vanadium steel for durability and resistance to rust and corrosion.