Introducing the Brass Template Guide Lock Nut by POWERTEC Our exclusive router guide lock nut secures your guide template in perfect alignment onto any Porter-Cable style sub base (one that has a 1-3/16” or 1-1/4” opening in the base) / (part of 71166). Designed for use with the POWERTEC 71349 Router Template Guide or any similarly sized router guide. Our brass locknut for your router template guide bushing ensures uniform and flawless routing outcomes in all your template router applications that involve 1/4" templates. This handy lock nut is knurled for easy adjusting and tightening. - easy, precise, on target. POWERTEC is a professional manufacturer of high quality woodworking machines, wood work accessories, and a wide assortment of OEM replacement parts. We are committed to exceeding expectations, while bringing the best innovations, technologies, and product development to the industry.