Features and Benefits: CR-MO alloy steel for long life; Lifetime guarantee; Heavy duty blow molded storage case; Set includes: 1/4in. to 3/4in. and 6mm to 19mm hex drivers, in a blow molded case; Impact Hex Bit Set, 1/2" Drive, 20 Piece, 1/4" to 3/4", 6mm to 19mm, in Case.INCLUDES:10 SAE Sockets:1/4"" (26481) 9/32"" (264811) 5/16"" (26482)3/8"" (26483) 7/16"" (26484) 1/2"" (26485)9/16"" (26486) 5/8"" (26487) 11/16 (26488)3/4"" (26489)10 Metric Sockets: 6mm (26491) 7mm (26492) 8mm (26493)10mm (26495) 12mm (26496) 14mm (26497)15mm (264912) 17mm (26499) 18mm (264913)19mm (264910)