The handles replaced at my normal Hoppe handles similar, not lockable "Softline" form and function as desired. I had this in advance, to the extent ordered another model to choose from, with the other, also from Hoppe model chunky - some would describe as a robust, acts whose Olive is larger in all dimensions, and also the key little bigger. Is locked by pushing the lock cylinder in the handle, which means "to" and "tilt" is only possible in the standings, while no key works just as if the key. Is unlocked by turning the key with pleasant small angle of rotation, whereby the lock cylinder while back about 0.5cm from jumping out of the handle. Only less gratifying point is the insertion of the key, which makes a little hakelig unless you really quite exactly axially goes to work. However, this relates to the mentioned other model in the same way. The keys seem to fit the same for all locks of the same model, just between the two different models can not be exchanged. A security risk, however, I do not see it, since it comes to thwart the drilling of the frame and attaching a four-cornered bar from outside for the actuation, the opening of the window sash or thwart by breaking the glass near the handle. Of course burglars now could carry an assortment of all keys from different manufacturers and models, but is not known to burglaries are to run fast, which does not foster a Durchprobbieren several key given the somewhat hakeligen insertability. Assembly time ever handle 1-2 minutes. As long as the Mechnismus works reliably on my part >> Buy recommendation.