Very high resistance. Homeowners can protect themselves against forced entry attempts with this VdS-certified security bolt. Small bar, big effect: With the security bolt, you can reliably secure your wooden, metal, and plastic doors against intruders. The bolt is installed across the entire width of a door measuring 73.5 to 103 centimeters. It securely engages in two locking boxes that are anchored in the masonry. Thanks to its special drive mechanism, the security bolt can be operated quietly. Mounting materials and three keys are included in the delivery.