These are the most versatile pieces of plastic made by Revolution Climbing. The Universal Board was designed to be used for Campus, Hangboard and System Training. CAMPUS: At 16 long and 4 7/8 wide, six Universal Boards fit on a 48 sheet of plywood with standard 22 cm intervals between rungs. It has standard Campus holds: A flat 1.75 edge and a sloping .75 edge. SYSTEM: Mount these in staggered left and right intervals on a steep wall to focus training specific weaknesses HANGBOARD: Light and inexpensive. The Universal Board offers the basic holds for your pull-up and dead-hang training regiment. The Universal Board is available individually for Hangboard usage mounting board included or in a discounted 6-Pack for Campus and/or System Training. Screws included.