Features and Benefits: Includes sizes: male: 3/8 in., 11/32 in., 5/16 in., 9/32 in., 1/4 in., 3/16 in., female: 3/8 in., 11/32 in., 5/16 in., 9/32 in., 1/4 in.; Forged from the finest chrome-molybdenum alloy steel, the best choice for strength; Black oxide finish and has etchings for identification; Included in a heavy-duty blow mold case.; All Sunex impact sockets meet or exceed ASME specifications; This is a drive drain/pipe plug impact socket set with 11 pieces. Sockets are 3/8 in. drive. For use on most vehicles Male 3/16 in. - 3/8 in./Female 1/4 in. - 3/8 in.