Shop the DEWALT Ceiling Clip Assemblies - CSI Spiral Drive Pin w/ 90° Ceiling Clip, 32mm (1-1/4") Top Hat, w/ 90° Ceiling Clip. Ceiling Clips are used for acoustical applications, suspended ceiling systems, fixtures, and wire components fastened to concrete, concrete-filled steel deck, and steel. Several styles and types of angled clips with pre-mounted pins are available, along with a ceiling clip without a premounted pin. ICC-ES ESR-2024.