The Performance W36400 10-Piece 1/4-in Drive Metric Deep Socket Set is constructed of chrome vanadium alloy steel for strength and durability. Features: * Packaged on plastic slide rail for storage * Recessed edges * Socket openings are designed to reduce fastener rounding * Chrome vanadium alloy steel construction * Polished nickel chrome-plated finish resists corrosion * 6-point sockets * Set includes ten metric socket sizes: 4mm, 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, 11mm, 12mm, and 13 mm What"s In The Box: * Performance W36400 10-Piece 1/4-Inch Drive Metric Deep Socket Set