Sizes include 8mm through 19mm in professional wrench rack. Flex GearWrench combines the efficiency of a ratchet with the access of a wrench. Plus, you can vary the offset angle of the wrench to almost any degree. Limited lifetime warranty. Flex Head: Yes, Metric Size(s) (mm): 8,9,10,11,12,13,14,15,16,17,18, 19, Ratchet Head: Yes, Point Size (qty.): 12, Pieces (qty.): 12