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 - Plain Fitted as standard to E901/1 4 Mag Major Stand. Column: 20 x 266mm. Cross bar: 12 x 200mm. Threaded: M8 x 1.25mm.