As there is no industry standard for the bases of routers, it can sometimes be difficult to match your router with suitable guide bushes, when using routing jigs such as dovetail, sign writing and hinge jigs. This universal router base will fit all leading brands of router, allowing you to fit industry standard brass guide bushes which come in a wide variety of diameters and depths. Measuring 165mm in diameter and 8mm in depth, the universal base is made from a special phenolic which is extremely hard wearing and offers minimal levels of friction to ensure a smooth passage.