Double Cylinder Deadbolt: Double cylinder deadbolt sets have a keyed lock on both sides of the lever set. Single cylinder lever set is by far the most popular function of handle set. [Product Features] Keyed alike entry door knob and deadbolt set(all locks can be opened with one key), DOUBLE cylinder deadbolt(keyed both outside and inside); Made from solid steel; Door knob set in Satin Nickel.
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