There are several ways a drawer slides in and out of the opening. One way is with a wooden rail that runs from front to back in the cabinet. The drawer has a channel that accepts the rail.

Attach Drawer Slides to Large Pullout. With the parts for the lower pullout (A — C) and storage boxes (D and E) assembled, use 1/2-in. spacers to attach the inner rail of the drawer slides to ...

Join the drawer rails to the side assembly and clamp until the glue sets [10]. Then, slide the remaining back panel into position and glue the second case side in place.

Slide-out cabinet drawers are really just boxes with drawer slides, but they can cost an arm and a leg if you order them premade or custom made.