This easy-to-install indoor swing lets kids play actively indoors instead of outside! No tools necessary for installation: Just place the 2 vice grips in the correct locations, insert the bar, and hang up the swing! The perfect activity for rainy or busy days when you can't make it to the park! Compatible with wood doorways with a 3.5 inch minimum exterior width and a minimum width of 3-5 inches between door jamb and frame. Not compatible with metal, sliding, mobile home, and arched doorways.