I have old original cabinets. I have a drawer in my kitchen that won't close. It had a single bottom mounting bar that didn't close the drawer properly and was sagging. I'm a woman and was able to trim the length I needed for the metal bars under the bracket. I also cut out notches on each side of the bottom of the box. I installed the hardware and the drawer opens and closes effortlessly. I have no carpentry experience, just planning to fix my drawer! Working on a drawer in my old closet.