Review on 14 Inch Heavy Duty Soft Close Drawer Slides - 100 LB Capacity Ball Bearing Full Extension Cabinet Drawer Slides (LONTAN 4502S3-14) by Rahul Schatz

If you are replacing existing 1/2" thick rails, then these should be easy to install.In my case though, I built my own closet cabinets and drawers so all of my measurements for the width of the cabinet and the width of the drawer had to be very, VERY precise.They sliders are exactly 1/2" thick. But max overall gap between the drawer (both sides) and the cabinet walls is 1 1/8" - this means you would have a 1/16" gap of play on either side of the drawer. Anymore than that drawer rails won't engage rail housing attached to the cabinets. But if you make it to tight the rails will pinch and won't slide easily. It must be VERY precise. One of my cabinets, at the bottom, was off by 1/8" and when I installed the slider rails the drawer rail wouldn't engage the slider housing. I added 1/16" washers as spacers to one side of the drawer which was enough to get the rail to engage the slider properly.Luckily, aside from that one bottom drawer, mine were all very precise so I was able to get these installed. Took my time and it took me about 8 hours to get everything just right. Yes, 8 hours - but I have never built cabinets before, let alone drawers. My drawers are boxes that I will attach faces to later; so each box had to be installed precisely 1 5/8" above the one below it to account for 3/4" face overhang and allow for 1/8" between faces. My drawer faces will be inset to the framing so all facing, trim, drawer/cabinet faces are flush to each other. Max spacing between all flush pieces will be 1/8". Sooo, I have to take my time in all phases of the construction - and by far, the drawers were my biggest worry so I took my time and it all came out right. Very pleased.