What does a bench cookie do? These little round things are called bench cookies. Apparently they elevate your piece off a work station and enable you to use a router, saw, etc on the edges of your workpiece.
Do Bench Cookies work?
How do you make a bench cookie?
What is a Rockler Bench Cookie? SKU #456600. MFR #46902. Newly redesigned, these high-friction rubber pads hold your project rock-steady while sawing, sanding, or routing without the use of clamps.