The
uneven bars or
asymmetric bars is an
artistic gymnastics apparatus. It is used only by female
gymnasts. It is made of a
steel frame. The bars are made of
fiberglass with wood coating, or less commonly
wood. The English abbreviation for the event in gymnastics scoring is
UB or
AB, and the apparatus and event are often referred to simply as "bars". The bars are placed at different heights and widths, allowing the gymnast to jump from bar to bar.