Features of the Campus Blocks in. Blockin. sized versions of our popular campus rungs Great for system walls, home Woodies, or any place you need screw-on holds Custom tooling gives the blocks a comfortable, smooth shape Finger-friendly texture for endurance sessions Each rung has an incut side and a flat side Available in sizes small to 3XL for beginners through experts Blocks Are pre-drilled and include mounting hardwAre Easy, screw-on installation Each size packaged as set of 2