The two base cabinets are ‘floating’ (as in – no legs) and the mirrored upper cabinets are vertical opening.
Both upper and base cabinets need a strong backing behind the drywall to hold the weight. In this case it had nothing, luckily the contractor was very helpful and opened up the wall behind and put in some wood blocking to screw the hanging system into. Very helpful chaps. And may I add, drilling into tile isn’t easy either!
(all Scavolini products)