Perfect fit enables tensioned pleated, roller, venetian and wood blinds to be installed onto the majority of UPVC windows, integrating the blind into the window frames.The frame simply clicks into place between the glazing and the beading with no need for drilling. Easily removable for cleaning, they are the number one choice for those who desire clean sleek lines, clutter free window sills, and as there are no cords required, homes with young children.