OUR PART # 74150
The Rosco 74150 is a stage plug. Stage plugs are used in conjunction with Steel Stage Screws (sold separately). It's designed for a 9/16" hole.
Using the Stage Plug
First, drill a 9/16" hole into the floor where necessary, screw the Stage Plug into the floor with a wide straight blade screwdriver, then fit the Steel Stage Screw into the plug. Steel Stage Screws should be used when the screw is needed in the same place more than one time, or where extra holding power is required.