This top provides you with the option of building and using a more compact multifunction workbench. This UJK Technology Professional table top is 18mm thick Valchromat, pre-drilled to fit directly onto the UJK Technology Professional router table leg stand. Valchromat is not MDF it is a type HDF. Valchromat has greater internal cohesion, higher mechanical strength and is more moisture resistant than MDF. The top measures 800 x 600mm and has a grid of 20mm Twist Dog holes: 7 holes by 5 holes. These holes are CNC machined to guarantee accuracy, aligned lengthways and widthways with the rows perfectly square to each other. Twist Dogs lock securely in the holes and won’t rock or budge until released. These 20mm diameter holes also allow the use of Parf dogs and many other accessory clamps, guide rails and stops to hold, saw, rout and machine your work with spot-on accuracy.