This is compatible with both side and under mount slides. The X-Series Bracket System by Century Components is a revolutionary product, designed to provide affordable, high quality, tool-free adjustability for roll-out shelving systems. The X-Series Bracket System is the most advanced rollout shelf bracketing system available today. Tool-free adjustability allows you to quickly and easily adjust your shelves up or down to maximize your space for short or tall items. After all; you’re investing in the space inside the cabinets as well. Many uses: Base Cabinet Systems, Pantry Cabinet Systems, American made, Tool-free adjustability The patented (#9364090) metal brackets screw to under mount and side mount slides and with a simple slide/swing motion lock firmly into the wood pilaster.