Heavy duty and very well made. Great looking too.It’s worked outThese rollers are heavy duty! Love themQuality product. Easy and flexible install for all types and sizes of barn style doors.This floor guide is super rugged and very flexible in its layout, but it's a pain to install Why?* If you simply screw into the wall atop the existing flooring, it sits so high that the bottom of the door catches on the metal! So the company guidance (in its hanger hardware manual) to cut the door for 3/8ths inch bottom clearance is useless. To avoid having a very high bottom edge clearance (which looks odd), I had to rout out a recess for the guide so it sits flush with the floor -- this took a long time in very hard bamboo floor. I have a router, but it can't get within a couple inches of the wall, meaning I had to further cut out the rest with a rotocutter tool and a hand chisel. Took hours of very meticulous work!* Figuring out how to set the guides themselves was super confusing, and the instructions are no help. The guides are plastic rollers anchored on two bolts of varying length, but you really can only set their location AFTER the guide is screwed into the floor (just tight enough to prevent the door from swinging in and out, but not so tight that it puts friction on the door). It took a while to figure out how to set the bolt tightness such that you could move the posts in and out to the right position, with the guide screwed down and the door inserted, and then tighten correctly. The correct method (not explained in the instructions) is 3 steps: 1) With the guide not yet installed on the floor, first get the bolts screwed into the washer on the underside just enough to keep them in place, but not so far that they protrude from the bottom of the guide. A protruding bolt will not allow the guide to sit flat on the floor, and it will make it impossible to slide the bolt into the right position. 2) After the guide is installed on the floor (whether recessed into the floor or flush on top), move the bolts on either side of the door such that they provide a tight (but not rubbing) fit for the door to slide past. 3) ONLY THEN tighten down the bolt into place. But here is the key part: you don't tighten the bolt by further turning the bolt itself -- instead you tighten down the locknut that sits directly ON TOP of the guide. The bolt is only tightened to the underside lock washer BEFORE installation of the guide; final position of the bolt is determined by tightening the locknut AFTER installation. You will need a 9/16ths" wrench to tighten the locknuts.Finally, I found that I had to use the taller of the two bolt options on the guides, even though i was using only a single roller. The shorter bolt did not provide enough room to tighten the locknut with the wrench because the roller was simply too close to the locknut to let me slip in the wrench. With the longer bolt you can slide the roller up and out of the way to sneak in the wrench.Based on the elaborateness of the explanation, i hope it's clear that the instructions could be better. The construction is high quality though.Nice glide very well built , far from cheap, A+Exactly as advertisedHelps keep heavy barn door on trackWell made and works well