Manfrotto 271 Panel Clamp with 5/8-Inch SocketManfrotto 271 Panel Clamp with 5 8 Inch Socket Clamps onto round and square tubes from 22 mm to 30 mm. Ideal for supporting reflector panels or hanging objects from pipes. Key Features Ideal tool for supporting panels or hanging objects from pipes Clamps onto bars from 22 to 30mm (0. 86 1. 18'') Clamps both onto square and round tubes Attaches to stands through female 16mm (5 8'') socket