I have used them on pre engineered wood/glass barn doors and on very heavy custom barn doors. Installs one on each end for soft opening and soft closing. The investment is definitely worth it. It's a little tricky to adjust the top hook/clasp that grips as too high it locks up and too low it sometimes slips off. Installed on 8 pocket doors (2 very, very heavy doors) for 1.5 years and work reliably. I recommend the heavier ones to keep the doors closed.
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