... work efficency.72-teeth need as little as 5 degree to move fastener while a regular ... ANSI standardAll wrenches are clearly marked with the size in four places on two sides for ... 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25mmImperial:5/16" 3/8" 7/16" 1/2" 9/16" 5/8 ... " 11/16" 3/4" 13/16" 7/8" 15/16" 1" Open ratcheting wrench ...