The American DJ S-HOOK is strongly recommended to safely and securely hang heavy lighting equipment. This hook will attach to a 1” to 2” thick trussing or pipe. Bring safety and stability to your performance with this hook. A great performing hook at a value price. Make sure to always make safety the first part of your show. If you don't have the right hooks on your fixtures you could risk everything. Add the ADJ S-HOOK to your fixtures and keep your mind at ease.