Simple comfortable jugs. No bolts required, all the holds can be screwed on the wall easily. There are three sets in this range, 15 medium, 16 medium footholds, and 5 Large. The idea was to create a range that can be easily installed on home walls for our little friends. This is why one of the sets, the footholds, contains very generous and comfortable footholds, targeted to none climbers as well as amateur climbers who don't yet own a pair of climbing shoes.