Da-Lite Hook Clamps Series

Hook Clamps are the Da-Lite fitting for hanging a screen case off structure that is already there, rather than drilling a new mounting line into it. They take the case weight onto the hook and leave the finished ceiling alone.

Ordered as a screen accessory, separate from the screen itself, which is how a case specified for wall mounting gets suspended instead once the site survey comes back. Listed by Da-Lite as an active stock part.