BASI appears five times, and twice in a way that matters: it is the cylinder maker in this catalog that states a standard most plainly.
The standard, reported as stated
BASI states that its V55 range is tested to EN 1303:2015 — the European standard for cylinders for locks, covering durability, key security and attack resistance. This site reports that as a manufacturer’s declaration: we are not a testing body, we do not assess conformity, and the listing does not publish the individual grades within the standard.
It is nevertheless the most direct statement in the cylinder hub — the GERCAR MLBL-60P3 cites EN 1303 only “on the essential points” — and it is worth something that the company is prepared to make it.
The window locks, and why the packs matter
Sold in threes and fives, which is roughly a ground floor and a whole house. Window locks fail because they stop being used, and BASI’s push-button mechanism needs no key to lock — which is the difference between hardware that is engaged every night and hardware that is given up within a few weeks.
Fifty-millimeter (2 in) screws are supplied, long enough to reach the frame reinforcement.
Where to be careful
On vinyl, every window lock in this catalog holds only if the screws find the frame’s steel reinforcement. That is an installation question rather than a product one, and no packaging solves it.