Avenger MAC150 Swivelling Junior C-Clamp 28mm/1 1/8" Gravity CastThe Avenger C150 Swiveling C Clamp is a gravity cast C Clamp with a locking swivel mechanism. The swivel allows easy aiming of the fixture without having to loosen it from its mount. It has 3 ways of mounting a fixture: Baby (5 8") receiver, a Baby (5 8") stud or Junior 1 1 8" receiver. Specifications Construction Aluminum Attachment Size 1 1 8" (28 mm) receiver 5 8" (16 mm) receiver 5 8" (16 mm) stud Maximum Capacity 165. 3 lb (75 kg) Rating TV81