The kids climbing holds can be easily assembled with the bolt set included in the package. Designed with non-slip indentations, the climbing holds come with highly firm and secure grip. After being assembled, it will be a complete climbing wall. Your child can enjoy playing and exercise his coordination ability. Ergonomic design makes it suitable for human hands, making it comfy to hold when climbing. Made up of premium material, the climbing rock set is both suitable for indoor and outdoor use.