So you mean for clamping a "pattern board" behind the particle board you want to cut and then following the pattern? I use a 1/2" diam x 1" long router bit I got from Rockler (#90836) with a matching 1/2" bearing on the end. Does an equally good job on both plywood and particle board. Believe I used medium to medium-high speed on this. With the small diameter bit, you can run higher RPMs and it cuts nice.