Meets or exceeds ANSI standards 6 in (15 cm) dual position extension bar, 5/16 in, 3/8 in, 7/16 in, 1/2 in, 9/16 in, 5/8 in, 3/4 in, 13/16 in, 8 mm, 9 mm, 10 mm, 11 mm, 12 mm, 13 mm, 14 mm, 15 mm, 17 mm 3/8 in drive, Quick release ratchet, Storage rail Chrome vanadium steel make for maximum strength