A simple yet reliable solution to mount your imac. This precision-machined aluminum adapter is specially designed for easy mounting of your imac desktop computer (compatible with21" and 27" imac models) on a light stand top which comes witha 5/8" (16m) baby stud . The triangular plates are made with4mm thick high-grade aluminum which can be securely attached to the imac's cable pass-through hole withm6 bolts x 3 pcs (included). A 1/4”-20 female threaded and 3/8”-16 female threaded are drilled on the top 5/8" (16mm) baby receiver adapter for attaching any lighting, video or photo accessories. Comes with1/4”-20 or 3/8”-16 male threaded.