Build upper body strength and confidence with these climbing rock holds by Swing-N-Slide. These 12 climbing rocks are constructed of durable plastic, making it easy for your child to climb like a pro! These rocks can be easily added to a wooden swing set climbing wall. Designed with small hands in mind, These rocks provide a safe and secure grip to assist children during climbs. Includes 4 plastic rock holds and hardware (lumber not included). Note: 2 sets required for 4' Wall, 3 sets required for 5' Wall, and 4 sets required for 7' Wall.