Perhaps for routing trim "in-place"?

Quickscribe is an excellent product, a scribing tool for cabinetmakers, woodworkers, carpenters and installers of flooring, countertops, wall paneling and other wood items that need to fit to walls or floors. Using it and a laminate trimmer (not included), you can make the cut in the same time it used to take to draw the cut line!

Also works as a 'system' with its sister product called Scribemate.



Scribe tops to walls, backsplashes to tops or make perfect templates, quickly and accurately. Built in wheel rolls along the wall without marring, plus the bit is centered so the laminate trimmer can be rotated during cutting without loss of accuracy; fast setup time (under 5 minutes). 3' x 5' x 1-1/2'; ruggedly constructed for years of use. Fits Porter-Cable 7312, 97310, 97311 and BOSCH 1609 laminate trimmers. About $60. Quickscribe site is here."