Metric Hex Wrench Set (3)Details: Package Includes: 1 x 1. 5 mm Hand Wrench w label and wrap 1 x 2. 0 mm Hand Wrench w label and wrap 1 x 2. 5 mm Hand Wrench w label and wrap Tool Makeup: Tool hex cut with diamond wheel for ultimate precision Tool shank CNC ground from US Grade tool steel drill blanks Tight tolerances held within 20 Microns which is . 02 mm and moreover . 0008 in. ! To put that into perspective that's like taking a human hair and dividing it by 4 ! Super