If your bag slides around when you punch it, you may just have one heck of a hook! In any other case, you may need to add more stability to the base.
For maximum stability, we recommend using a bag ring (you can purchase one HERE!) and filling the base with 350 lbs of dry play sand. If that is not enough weight, we suggest adding water to make the sand denser. Please note though, that it will be very difficult to remove wet sand if you ever decide to empty the base.
If your bag top is swings back and forth when punched, it might be installed incorrectly. Click HERE to make sure that it is properly installed.