The lock with a push button seals and unlocks the cover. Pulling the side drawstrings allows for locking the roll cover even when it is partially open.
The alu cover is mounted with alu clamps. For the water drainage pipes, two holes have to be drilled into the cargo bed.
Note from the manufacturer:
Because of the chemical makeup of the cleaning agents, the usase of a car wash can't be recommended for the cleaning of the anodized covers.