Router Table Lifts Take The Guesswork out of Height Adjustment Identical to standard plates! The top mounting plate is identical to the standard aluminium router mounting plates – milled and CNC-machined from 6mm-thick aluminium plate. Over and above the standard mounting plate, a few extra holes are machined to mount the lift assembly underneath. The aluminium is anodized and then checked for flatness after this important step. There are six grub screws installed along the edges of the mount plate to ensure a perfectly level fit on the lip of the router table underneath it. The centre hole is 92.2mm diameter and includes one phenolic twist-lock insert ring that has a 38.1mm aperture. The insert ring spanner comes standard with the mount plate as well as a starter pin and two holes to mount it either to the left or the right of the bit. Four Pillar Design This lift has four pillars at each extremity of the lift – all threaded so that when the cradle is adjusted – they all act in unison to keep the cradle perfectly parallel to the top plate. The threaded rod is dead-straight, heavy-duty hardened black steel that will last a lifetime. The pitch of the thread has been set so that a full revoluation of the winder handle results in exactly 2.00mm of height adjustment – a quarter turn is exactly 0.5mm and even the positive action of one graduation is as fine as 0.1mm. There is minimal backlash so you have certainty that you can make these fine adjustments and rely on their accuracy. The positive locking action is guaranteed to prevent any unwanted movement. Once you've got it set, get routing.