50 large bolt on Rock climbing holds with hardware. Rocky mountain climbing holds are made from 70% recycled materials. We keep plastics out of land fills! what are they made of recycled materials including polyurethane, vinyl ester, polyester, plastics, epoxy, Vegetable oil and other organic materials. Rocky mountain climbing holds are 100% American made. At Rocky Mountain Climbing Gear, we take pride in our climbing holds ensuring that they will stand up to any climate, hot or cold. Use indoor or outdoor, rocky mountain climbing holds are perfect for any project! please note these are the bolt on variety. They are meant to be used with 3/4 plywood. They are not meant for 2x4's or 2x6's, for those projects please refer to our "screw on" climbing holds.