"High-performance alloy steel with state of the art precision quench and temper heat treating process","High-visibility laser etching on 2.4\" overall length sockets","Includes sizes: 4mm, 5mm, 6mm, 7mm 8mm, 10mm, 12mm","Set comes on a socket rail 3/8" DRIVE ADV 7 PIECE METRIC ADV HEX BIT SOCKET SET SBPMXY7V | Matco Tools