No hardware, screws, or fasteners are needed, so the bar installs quickly and can be removed in a matter of seconds.  Our Support Bar is easily suspended in nearly any doorway--drywall, metal, unfinished doors and hallways -- doesn't matter.  Then you just choose the attachments and you have instant vestibular stimulation. No tool required! The patented expandable support bar simply accommodates any standard doorway measuring from 29" - 36" wide.  Non-marring saddle supports distribute weight evenly over a large surface area. Holds a variety of different accessories for fun activities. No hardware screws or fasteners are needed to attach the unit to the doorway.  Portable mounting supports up to 75 pounds and hard mount supports up to 175 pounds.