This item is only the rails. There are inserts that are not offered at target to extend this product to full/queen size bed. I purchased product elsewhere and product has been very helpful with elderly parent. It is very easy to use.
It doesn't fit a queen size bed. The crossbeams adjust to different widths of beds, but are about 4-6" too short for a queen/full. (If I'm not mistaken, a full is the same width as a queen.) So basically the only size bed these will fit is a twin. What's the point of even making them adjustable if they aren't going to make them fit different sizes of mattresses? Other than that, they seem like they'd be very sturdy and easy to install.