First very good but then .....

Have protected by these locks, our patio doors. The installation is also to deal with a "handyman", even if it is in strange feeling to be drilled in the window frame. It is recommended to the doorframe previously good study on the situation of existing locks and mechanical parts that should not be blocked by screws.

On the downside, there is hardly any game, the holes have to be extremely precise. This is best done by using the spacer plates as spacers (between the hinge and door) when marking.

So far so good, and everything worked perfectly.

Only a few months later, the door starts a little "move" so that the small game means that they occasionally creaks (mind modern plastic doors). Silicone spray will help this situation, but holes with some leeway to readjust would really an advantage.

Otherwise, good workmanship, understand instructions and provided that the test results say good security.