Deadlocks Bolts are auxiliary locks to complement knob locks. In other words, we use this type of lock on doors where we want to improve the security provided by a knob lock but still maintain aesthetics. Main features: Suitable for institutional and residential buildings.There are models with only an internal thumb turn, an internal thumb turn with an external key or a key on both sides.* We recommend downloading the technical data sheet below to see all the options. Downloads DEADBOLT514_Technical_document_1_TESA.pdf (.pdf, 92 kB) Close LatchThe latch is a mechanical component of the knob lock that… Embellishing escutcheonsReplacement round shield