Lock grade 3 is the least secure of the three lock grades. It should be considered basic door hardware, for non high security situations, and is the least expensive. It is also the co… さらに表示

Lock grade 2 is the next level up in terms of testing and security. Grade 2 locks are not usually sufficient for many commercial buildings, but they exceed the building requireme… さらに表示

Lock grade 1 is the top-of-the-line lock rating. They are typically intended for commercial security, but we are seeing more grade 1 locks targeting residential use (partic… さらに表示

The ANSI grading system does not appear to make a distinction between residential and commercial graded locks. So long as the minimums mentioned above meet the tests, the g… さらに表示