The Avenger D570 Extension Arm with Swivel Pin is a chrome plated steel grip arm which is 91 cm/35.8 in length and has a swivelling 16 mm/ 5/8\" pin on the end. The swivelling pin is on a ball joint that allows the baby pin to swivel into position to place lights and other light shaping tools. Use in studio or on location this flexible extension arm works best when used with an Avenger D200 or D200B 2 1/2 in grip head. Recommended Accessories: A2030DCB, A2030D, A2033L, A2033F, A0035B, A0035CS, D200, 172, 023 L-Peso