The EUROLITE TH-250S QUICK-LOCK is an aluminum-cast mounting hook for attaching projectors and lighting effects to truss systems with tube diameters of 45 to 50 mm. It uses a QUICK-LOCK mechanism with a large wing bolt and has an M10 mounting screw. The black coupler measures 19 cm in length, 3 cm in width, and 3 cm in height. Its maximum working load limit is 250 kg, and its weight is 0.49 kg.