For singers directors and accompanists who need a folder holding hole-punched music. In addition to having a comfortable hand-strap it can nicely open flat to be placed on a piano organ or podium. It is a durable lightweight ergonomic folder optimized for holding hole-punched music. This version has a bottom strap which can be un-buttoned on one side to open the folder flat. A solidly-mounted 1 set of rings opens with the push of a single button and they feature a snag-free interlock to avoid catching paper mid-turn for quiet page turns of recording-studio quality. Dimensions: 10 width 12.75 length.