6 inch clamping range Metric: 7, 8, 9, 10, 11, 12, 13, 14mm British: 9/16, 1/2, 7/16, 3/16,5/16, 1/4inch Note: The data are all measured manually, please allow 1-3cm error Due to differences in light and display, there may be some color differences, please refer to the actual item received.