In addition to an elegant and modern design and high ease of use, heroal sliding and lift & slide doors offer a high level of security. Particularly older patio doors often present weak points that burglars exploit. They are one of the most common burglary targets for single-family houses, as they are often not visible from the street. To increase burglary protection, heroal sliding doors can be equipped with anti-lift devices, drill protection, floor locking and safeguards at the centre joint as well as lockable handles. This provides burglar protection up to resistance class RC 2 (WK 2). This class means that the patio door can withstand a burglary attempt on each component with screwdrivers, pliers and wedges for at least three minutes. In that amount of time, most burglars will have already given up.