THIS IS A HUGE LOT OF ROCK CLIMBING WALL HOLDS.  THE COLORED ONES WERE FOR KIDS PLAYGROUNDS AND THE GREYISH ONES WERE KINDA MEANT FOR PROFESSIONAL ROCK CLIMBERS.  I BOUGHT THEM A FEW YEARS AGO IN AN ATTEMPT TO BUILD A SMALL OBSTACLE COURSE AT MY HOUSE.  I NEVER GOT AROUND TO FINISHING IT SO I AM SELLING THESE.