This Edge Guide is very easy to mount to your existing router. The instructions are precise and the material is made of a high quality metal to last for numerous years. As a professional woodworker, I am impressed  with the accuracy and easy set up with this tool. The micro-adjusting knob  really helps in close tolerance projects. I am very happy with all of my  Porter Cable tools and would highly advise anyone, novice or professional,  to add these instruments to your woodworking shop!