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. Medium Duty Fitment - 3 Point Fitted as standard to KEN- 333-2110K. 3 point adjustable column: 15 x 280mm max. Threaded: M8 x 1.25mm. Clamp hole: 8mm.