All main columns are threaded M8 x 1.25mm and are interchangeable with Kennedy, Oxford, Mitutoyo etc. base units except mini-mag (M6 x 1mm) also suitable for incorporating into special fixtures or threaded pot magnets. Light Duty Fitment - Plain Fitted as standard to E909 Kennedy Mini-Mag Stand. Column: 6.3 x 120mm. Clamp hole: 8mm. Threaded: M5.