Each set contains a random mix of various sizes of holds. It's the ideal starter set for a home wall Bolts, t-nuts, self-drilling screws and multi-wrench included, Pu holds, + a book "how to build a bouldering home wall" Included: 5 screw-on footholds, 5 screw-on Handholds, 1 screw-on Rail, & Screw-on Outside corner, 4 screw-on Modulars 5 Micros, 4 Modulars, 4 Mini jugs, 1 Macro/Roof jug,