The Snap-on 6-Piece 3/8” Drive Metric 6-Point Flank Drive Deep Universal Socket Set, No. 206SFSUM, includes 10mm, 12mm, 13mm, 14mm, 15mm and 17mm sockets for a wide range of tasks. The Flank Drive wrenching system provides improved turning power with less risk of tool or fastener damage, according to the company. The durable chrome socket set also includes a magnetic storage tray.