I have bezel cabinets and was concerned I would have to order a separate accessory to install them. The included instructions specifically state that they are for frameless cabinets. However, for me they are perfectly installed without the need for additional accessories. I simply screwed the side rails to the inside walls of the cabinets and the rails to the drawers and it all went smoothly. I like the full extension of these slides as I have multiple drawers with items that were previously difficult or awkward to pull out of the drawer. This is no longer the case. For me, however, they are not slow to close at all. Like the old cheap slides I had before, they slam the drawer shut. Watch the attached video. It's possible I did something wrong during installation that caused this, but I don't understand what it could be. The rails inside the cabinets are installed as far forward as possible. Putting it further forward would have prevented the drawer from closing completely as the front of the drawer would hit the rail.