WM - Kwikset 665 Double Cylinder Deadbolt from The 660 Series - Antique Brass

Yes, within the Kwikset keyway. The 665 uses Kwikset's standard five pin KW1 keyway, which is the same keyway used across Kwikset residential knobs, levers and deadbolts, so a locksmith can key it alike with other Kwikset cylinders on the same key. It will not key alike with Schlage SC1 hardware, that is a different keyway and requires swapping cylinders or standardizing on one brand.

Often not. Because the 665 is key operated from the inside as well as the outside, it does not permit free egress without a key, and residential codes and many property insurers prohibit double keyed deadbolts on required means of egress in dwelling units. Property managers standardizing a building are usually better off with a single cylinder deadbolt with an interior thumbturn, and reserving the double cylinder 665 for storage rooms, side service doors, or glazed doors where local code permits it.

This 665 deadbolt is finished in antique brass, a darkened, aged brass tone rather than a bright polished brass. It will coordinate with other Kwikset antique brass knobs and levers in the same finish family. If your existing hardware is polished brass or satin nickel, the antique brass will read noticeably darker and warmer, so order the matching finish instead of mixing.