PREMIUM HARDWARE MATERIAL : ROMMTEC sliding barn door hardware is made of high quality steel ensures anti-corrosion and longevity. Industrial grade tracks and pulleys can easily hold 400 lbs. loads SINGLE TRACK BYPASS SYSTEM : Upgraded One-Piece single track bypass sliding barn door hardware is low ceiling design, only need 6 inch ceiling space from top of the door to ceiling; Wall-mounted is very easy to install, no tedious installation steps, saves more space than a side pull door and traditional double track bypass kit SLIDE SMOOTHLY AND SAFETY : More safely unique antijumper, prevent thedoor lifted off the track,smoothly sliding operation gives you ultra-quiet experience. The perfect addition to homes,interior doors and room dividers, sliding doors provide an innovative solution for closed off rooms or tight spaces. NOTES : Fit up to 60" Wide Door;Fit Door Thickness 1-3/8" ~ 1-3/4",Make sure the height of holes on the wall is H + 1-11/16“ GUARANTEED SERVICE : ROOMTEC sliding barn door hardware kit has passed 160,000 times opening and closing tests, comes with a 5 year warranty. Any problem in using it, our professional Customer Service Team will answer questions for you.