General description This impact socket set contains 39 pieces of 6-point, 3/8in. square drive sockets. Manufactured from chrome molybdenum steel, each socket features a black oxide finish and permanent laser etched markings for easy size identification. The set is supplied in a robust, red impact-resistant plastic case with a molded handle for convenient organization and transportation. Technical specifications Drive Size: 3/8in Drive Type: Square Finish/Coating: Black Oxide Material: Chrome Molybdenum Steel Number of Pieces: 39 Set Type: Impact Socket Set Size System: Imperial Metric Socket Size Range: 6 - 22mm Standard length metric sockets: 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22mm Standard length imperial sockets: 1/4, 5/16, 3/8, 7/16, 1/2, 9/16, 5/8, 11/16, 3/4 inch Deep length metric sockets: 7, 8, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 21mm Typical Applications DIY Construction Automotive Other information