I bought and installed 3.5 "Front Panel by Delock and ANCHOR 2 frame. In both I had to drill the holes in the lateral screw openings of the frame, so that they were consistent with the threaded holes of the panel and I could screw this. This was not a problem, should but in my opinion not to be. Furthermore, the opening frame are not fit for the panel so that the side, a gap of approximately 1.5 mm. Not least, the 5.25 "front panel is too narrow. Even this does not fit in the width matches the frame of the drive.
I can for the product, especially for this price, make any recommendation.