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. Heavy Duty Fitment - Fine Adjusting Fitted as standard to KEN- 333-2060K and KEN- 333-2050K. Column: 12 x 175mm. Cross bar: 10 x 150mm with fine adjustment. Threaded: M8 x 1.25mm.