Marks 68F/3 Polished Brass Finish US3 Double Cylinder Solid Jimmy Proof Deadbolt Lock Set With Flat Strike, Ilco Captive Turn Knob Key, and Schlage SC1 Keyway, specially designed as a commercial grade locksmith quality lock set. The shutter guard provides extra security, prohibiting tampering with the lock if the outer cylinder is compromised. The solid body, is extra tough and durable, providing the perfect security, keeping the door locked, safe, and secure. This Lock features a rim cylinder with a flat tail piece, a solid brass body, a recessed cylinder collar, a flat strike, an ilco captive key, 2 keys with Schlage SC1 Keyway, mounting screws, and a mounting plate.

Note: Additional Key options are for regular keys only! Not for the Captive Key or the release key.