Needs some improvements. It is not suitable for all managerial profiles of windows. Works smoothly on PVC window frame with a thickness of more than 10 mm edge of the panes. A great difficulty with windows or aluminum windows to the edge of no more than 3 mm from the rubber seal. I have made some workarounds, but wishes that the problems be reassembled to the seller or manufacturer if possible to support, if found such. Thank you.
