CONVERT SQUARE HOLES TO THREADED: M6 cage nuts allow easy conversion of standard 3/8 square rack holes to threaded round holes INDUSTRY STANDARD COMPATIBILITY: Designed for Dell equipment audio racks and other M6 threaded applications EASY INSTALLATION: Spring steel flanges clip securely into square holes for a quick and reliable setup 50-PACK FOR CONVENIENCE: Ideal for large installations ensuring you have enough for multiple mounting projects DURABLE AND ADJUSTABLE: Cage nut design allows slight adjustments for alignment during screw installation