The Icon PCX100B Rail Accessory Clamp features an adjustable jaw to mount components and accessories to all Pearl Icon Rack Systems.The hinge-style and dual-nut clamping designs provide non-slip secure placement capable of withstanding the most demanding application.The PCX100 has defined the balance of strength and performance, making it a must-have for any ICON Rack System.SQUARE CLAMP SIZE1.57″ (40mm)MAIN CLAMPDual-Nut w/UltraGrip WingnutCLAMP CAPACITY1/2″ to 1-1/8″COLOURBlack