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A Grade 2 high security lock in layman’s terms is one that is just a heavier-built
lock with solid collars, guards around the bolt to resist ice pick attacks, heavier bolt,
heavier materials, and then going to the cylinder it has drill resistance in the keyway. It
has some type of a patented pin. In this case it’s the third pin which resists bumping.
It has a patented key which can’t be copies without matching signatures on your signature
card that you receive with a lock. You sign the back of it and only when those signatures
match will you get a copy made, so all around it’s just a heavier, better lock than your
grade three, your grade three which is just his light, very light pot metal-type, tin
can type materials, weak springs, screw-on caps that strip out, the bolts often fail,
the little pin and the ball breaks. Everything about this is just cheap and light and breaks
easily, so you don’t want Grade 3. You want to go up at least to Grade 2. If you can’t
afford a Grade 1 which we talked about earlier which is with the heavier bolt, inter-locking
ball bearings into the frame, the captive key removable thumb turn, things like that,
a little bit pricier, of course it is worth the extra money if you want to step up to
that much heavier lock body even than the Grade 2, but this is your alternative, about
$100 per lock less, and it has a lot of the features that you need to resist bumping and
keeping your, your neighborhood thugs out of your house; Grade 2 high security.