Controling material on most any table style power tool is easy with the board wheels. High tension spring power applies pressure while the tapered wheels control the board material. Each set includes 2 board wheels and mounting track. Direction is described as looking at the large face of the wheel

(HDD-01Y) Yellow clockwise Boardmate, for table saw
(HDD-01R) Red counterclockwise Boardmate, for radial arm saw
(HDD-01G) Green bi-directional Boardmate, for shaper
(SR24) 24"Boardmate mounting track