 Bolt should be 1" thick with a 1 ½" throw (bolt extended).
When installed, bolt should lock into place when extended. You should not be able to push the bolt back by hand.
Bolt should be constructed to include a hardened steel core.
Lock cylinder should be constructed of 100% brass (some manufacturers use a combination of brass and plastic).
Screws that anchor rear thumb-turn plate to front lockset should be heavy-duty at least ¼" or larger in diamater.
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Deadbolt face should be 2 pieces (outer slip ring with separate lock face - manufacturers may join both pieces together).
Outer slip ring should be free moving when NOT installed.
Outer slip ring should contain a tempered or hardened interior ring. (it shouldn't be hollow)
Deadbolt should be of a 6 or 7 pin construction. (Available ONLY through locksmiths)
Deadbolt should contain pick-proof pins. (Available ONLY through locksmiths)
When mounted to the door surface, the deadbolt face should be able to sit flush to the door to help defeat crowbar attacks.
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