Olsa Tools Black Spring Loaded Ball Bearing Socket Clips for Use with Olsa Socket Holders | 10-Pack (1/2-inch) EXTRA CLIP set (10 pieces) for your Olsa Tools Aluminum Socket Organizer 1/2-Inch drive size that will fit all Olsa Tools Aluminum Socket Rail Systems SPRING loaded ball bearings on each clip hold socket FIRM and SECURE CLIPS only; Tools not included FITS OLSA TOOLS SOCKET RAILS ONLY