ProX XT-GRTOP24 BLK 24" W Top for Hanging Grids.  The XT-GRU3024 Rapid Grid™ modular design allows endless configurations for single fixtures, double hanging or ladders of multiple fixtures, which can also be expanded to create a wall of hanging positions.  Each U module has two safety point attachments, one on each side for use with multiple styles of fixtures. The ProX GRU Rapid Grid™ System has been designed for quick deployment and take down in any environment.  The lightweight yet strong aluminum construction is additionally reinforced to provide added stability and safety.