13 Piece 3/8" Drive Fractional & Metric Hex Driver Set 3649 CR-MO alloy steel for long life Includes most popular SAE and metric hex sizes 5/16" (8mm) Included as 1 socket Fully guaranteed Heavy duty blow molded storage case Set Includes: SAE SIZES: 3/16" (36471) 7/32" (36472) 1/4" (36473) 5/16" & 8mm (36474) 3/8" ( 36475) 7/16" ( 36476) 1/2" ( 36477) METRIC SIZES: 4mm (36481) 5mm (36482) 6mm ( 36483) 7mm ( 36484) 10mm ( 36487) 12mm ( 36488) Sunex International Tools SU 3649 13 Piece 3/8" Drive Fractional & Metric Hex Driver Set SU3649