These climbing holds are designed for children, have correct size, textured surface and are easy to grip firmly. And easy to add on an outdoor play set or in a house wall, create a rock climbing wall in an instant.a good way to promote children's balance of strength and endurance.Installation method:1. Use the electric drill on the wall in a hole 4cm deep and 1cm wide.2. Insert the nut into the hole with the notch of the iron plate.3. Screw the screw through the cliff into the interior expansion screw. Use a Phillips screwdriver to screw the rock.Note: This product does not include screw parts!Specification:1. Material: plastic2. Weight: 95g/PCSPackage Included:20x Rock Climbing Holds (Assorted Colors)Note: This product does not include screw parts!Note: The data is all manual measurement, please allow 1-3cm error; due to the difference in light and display, there would be some color difference, please refer to the actual item received.