The 3/8 in. Drive Shallow and Deep Impact Socket Set is a collection of most frequently used 3/8 in. 30-piece set includes (15) 3/8 in. drive deep impact sockets: 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22 mm and (15) shallow impact sockets: 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22 mm.