27S0401A-F : Sae- 3/8"x13/32", 7/16"x1/2", 9/16"x19/32", 5/8"x11/16", 11/16"x3/4" 27S0401A-M: Metric- 10x11, 12x13, 14x15, 16x17, 18x19mm