Hey look at this! A great accessory add on for your backyard swingset! $90 retail 24 plastic molded rock wall holds. Four different patterns (6 of ea.) 2 hole mounting pattern so rock cannot spin. Rock holds are approx 2 1/4" x 4 1/2" with a depth of approx. 2" - Holes are 1 3/4" O.C. Mounting hardware not provided. Recommend using at least one bolt in each rock rather than two lag screws if mounting to a soft wood like cedar or redwood. Let your Child’s imagination take over.