The locking system used is ROTO system.
Adjustable ROTO hardware is characterized by:
- 3 corners / sash / set (high resistance)
- extra closing at the lower bracket, mushroom type(for security)
- standard burglary plate
- Dr. Hann extruded aluminum hinges, adjustable in 3 directions, fixed in the frame by 4 screws, secured to 210,000 cycles on / off
Carpentry fitting is done after german standards with the highest quality materials, ensuring a perfect seal over time.