This effective window locking can also be retrofitted and is in principle very simple: Mushroom head and stud are solidly connected with each other if the window is closed and this is inaccessible in such a way that cranking is practically impossible. The number of mushroom heads and the locking pieces play an important role - especially for large windows.
This prevents cranking during the burglary.
This makes the drilling with a power drill impossible.
In most cases made of hardened steel sheets, to ensure that the handle gearing cannot be drilled.
However, be aware: Who locks all the windows before leaving the house?
For example, hard wood with a high density to ensure that, for example, fastening screws hold fast optimally.
Prevents that the window can be ripped from its anchoring. For example with special screw anchors - and the right masonry.
To ensure that the frame cannot be pressed at the wall.
SILATEC safety glass withstands up to 20 minutes, even against ax and sledgehammer - no burglar has lasted this long.