The Performance W38304 21-Piece 1/4-inch Drive SAE/Metric Socket Set is constructed of chrome vanadium steel for strength and durability. Features: * Heavy duty chrome vanadium steel * Fully polished chrome-plated finish * Handy socket holder keeps tools organized * Includes 10 each SAE and Metric sockets: * SAE sizes: 5/32-inch, 7/32-inch, 1/4-inch, 9/32-inch, 5/16-inch, 11/32-inch, 3/8-inch, 7/16-inch, 15/32-inch and 1/2-inch * Metric sizes: 4mm, 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, 11mm, 12mm and 13mm What"s In The Box: * Performance W38304 21-Piece 1/4-inch Drive SAE/Metric Socket Set