Model: PC-40 Clamp Function:360°Panning Material:Aluminum Clamp Length:76mm/3in Height:20mm/0.8in Base Diameter:40mm/1.6in Net Weight:70g/2.3oz Thread Socket:UNC3/8”-16/M6 Clamp Type:Screw-knob Panning Clamp Aero-space grade aluminum main body elaborately CNC machinedand hard-coat anodized for abrasion and corrosion resistance. Provides better tolerance compatibility with different QR plates. Ensuring easier operation and simpler structure. 360° Panning base rotates smoothlyand quietly, can be tightened by the Panning Base Lock-knob