With Sliderbox there's no need to remove or relocate mounting screws to re-position the box. Simply loosen the mounting screws and move the box to the needed depth, then tighten the mounting screws to secure the box in the new position. Sliderbox has many features. Slots retain slider plate and guide it in a straight motion. Internal rails guide slider plate for smooth mounting adjustability in wall substrates from 1/2" to 1-3/8" thick and ceiling substrates from 1/2" to 1-5/32".