This Heavy-Duty Swivel Pin from Impact adds articulation to your stand or boom. One end slips onto a male 5/8" pin while the other supports a light or accessory with a 5/8" receiver. The ball joint allows 180° swivel of the fixture, while the large, rubber-covered T-handle provides secure locking in your chosen position. The barrel at the receiver end measures 1 1/8". Removing the tightening knob from it allows you to drop it into a 1 1/8" receiver.