This product was purchased to make a pull out shelf for my camper van storage. The product worked as advertised. However, as I prepared to install the rails, the cheap rubber guides at the end of each rail just fell apart. I hope this doesn't affect the sliding function of the 48 inch tablet I designed. Only time can tell. I ordered this as a second option because the 250# guides with locks were unavailable due to COVID, although the price was comparable so I just had to get by.