This Lens Collar for Nikon Z 180-600mm f/5.6-6.3 VR Lens from Kirk attaches directly to the rear barrel of the lens and secures in place by turning the captive locking knob. The collar features a Derlin liner for smooth rotation without marring the surface of the lens barrel. Made of black anodized 6061-T6 aluminum and incorporating an Arca-type dovetail design, the foot is compatible with a broad range of quick release receivers and other accessories. The base includes a QD Quick Disconnect receiver socket for compatible straps and two removable safety screws to prevent it from prematurely releasing from a clamp.