The Metolius Modular Screw-On Footholds are a great training tool for your indoor climbing wall. These little climbing holds are great for places where bolt-on holds won't fit or when you want a tiny hold. Pack includes 20 holds and a bunch of screws to mount them.Strong, flexible Fusion Resin to resist breakage. Set of 20 screw-on footholds. Super-technical, low-profile footholds that attach to wooden walls with self-drilling screws. Goes where bolt-on holds won't. Includes mounting hardware.