I have a 130lbs Outslayer Muaythai bag, this mount does the job for sure. The bag is 6.5ft tall, ceiling is 10.5ft high, I put a 4inch spring that could hold 300lbs in order for the bag to hang lower, check the photos. The mount was easy to install and makes absolutely no sound when the bag moves. I see that other customers are complaining that bolts and screws of the mount are loose..to fix that problem, I used a wrench to tighten it before putting the bag on. TOO EASY! Overall, amazing product, 5 stars!