The guides are of high quality, although they are made of light metal. I wasn't expecting anything heavier for the price. Used them to install kitchen cabinet drawers so nothing heavy is needed. Installation is easy, although you'll need to be mindful of side-to-side alignment, both front and rear, or it will either get stuck or go off track. This would be for all drawer slides. Suitable for flush mounting as well as for cabinets with a front frame (with additional fastening).