Remove the mattress and box spring from your bed.
Tilt your bed frame over to one side, so that you have access to the bottom of the legs. If your bed is particularly large or heavy, enlist a friend to help you.
Remove one felt pad from the packaging and place it over one of the bed legs. Have the metal ring on the bottom of the pad rest directly against the wood at the bottom of the bed leg.
Tap the felt side of the pad with your hammer. Two to three solid strikes should drive it into the wood.
Turn the bed over so it is right-side up again. Put your box spring and mattress back into place.