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How to hang a speed bag
Purchase a wall-mounted speed bag unit.
These units typically come with an inflatable speed bag, a bag mounting plate, and a number of sturdy poles you'll use to attach it to the wall. Try to find a unit that is adjustable so that you can raise or lower the bag mounting plate without tearing down the entire device.
Look for wall-mounted speed bag units at fitness supply and sporting goods stores. Personal speed bag units typically cost between $50 and $250, depending on the quality of the mounts.