Toy Park Rock Wood Climbing Holds/Stone for DIY Playground Wall, Large, Multi, 12Pc About ProductClimbing holds, come in different colour. These climbing holds have a rock like feel to them. Our holds are very strong and will stand up to any climate for any climbing wall, simply screw on your wall Suitable for both children and adult Create a place for you and your children, where you can have fun, improve your fitness, coordination and muscle strength These holds are nontoxic, tasteless, environmentally friendly, stable, durable and can be used for a long time.Installation method（for wall, not for wood block） 1 Use the electric drill on the wall on a 4cm deep and 1cm wide hole. 2. Insert the nut into the hole together with the notch of the iron plate. 3. Screw the screw through the rock point into the inner expansion screw. Installation method：（for wood block, not for wall）1. Mark the drill holes position on the climbing wall according to the climbing holds.2. Drill holes according to the mark point, drill bit diameter the same as the screw bolt diameter.3. Install the screw bolt across the flat washer, climbing holds and the wall holds in sequence to the weld nuts (weld nuts may need to tapped into wood with hammer beforehand)4. Tightened the screw bolt with the wrech.