25MM POST WARNING: Certain Grizzly, Laguna and other imported lathes may use 25mm posts which are slightly smaller than 1”. THESE WILL NOT WORK. PLEASE MEASURE YOUR POSTS BEFORE ORDERING. FYI: 25mm = .984”, and 1” = 25.4mm. 25mm posts are available special order.NOTE: For the Oneway 1640, only the Low Profile style rests and 9” J-rest will fit.