This Snap On Tools 16 Piece set is perfect for any mechanic or DIY enthusiast. The set includes 3/8 drive, 6 point metric sockets ranging from 6mm to 23mm in size. The socks are made from high-quality materials and are built to last. The set comes complete with a manufacturer part number of FSM Series and is sold as a set. The sockets are compatible with a Standard socket type and have a 6-point drive type. This set is ideal for anyone looking for a comprehensive collection of sockets that are built to last.