... . Available size: Metric: 8mm_25mm SAE: 5/16"_1". Metric: 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20 ... , 21, 22, 23, 24, 25mm. Imperial: 5/16" 3/8" 7 ... /16" 1/2" 9/16" 5/8" 11/16" 3/4" 13/16" 7 ... /8" 15/16" 1". Selling point: Reliable quality, Great ...