Designed for use as a heavy-duty guide on large, sliding doors up to 3-3/4 in thick. Slots in frame provide adjustment for holding doors against wood walls or posts. Delrin wheel is reversible; it can be used either side of frame. Offers sturdy steel frame construction. Meets ANSI/BHMA A 156.14. Roller is adjustable. Includes nail and lag screw holes. Hardened steel bolt for greater strength. Display packed.