I had no idea such things even existed. I bought my house and had problems with my cutlery drawer for about a year. About every week it would fall off its hinges due to the weight and the ripped hole holding one of the screws. The previous owner made the box in a strange way. I got tired of fixing the problem and started looking for hypothetical ways to change the drawer slides. I found a YouTube video where the wizard describes this product as an inexpensive solution. On a whim I ordered the product and haven't had any problems with the box since. It's been 4 months and the screw is still tight in the rubber mold.