Customers need to mold and concrete. Even a child can do:
1. Fill the mold with concrete
2. Concrete dries, lift the mold
3. Pour new stones, old stones dry completely
4. The mold can be extended in any direction, left, right or to the side (special shape of the mold)
Garden stones are very stable - under stones poured base 20mm, height 40mm stones themselves. The whole structure of stones in height 60mm.