The black and satin silver anodized aluminum and steel TQR-2L Tripod Head Quick Disconnect System with Large Plate from Kirk Enterprises attaches to a tripod's spider via its 3/8"-16 mounting thread. This clamp provides a quick release system that enables you to quickly switch out many types of tripod heads for different photographic applications.
The large plate is designed to fit tripod heads with an approximate base diameter of 2.25" or over. A laser-engraved scale on top of the clamp allows accurate positioning of the plate, which is then secured into place by turning the screw locking knob on the clamp. Set screws are included to secure the clamp to the tripod and the plate to the head and to prevent them from moving while mounted together. In addition, a bubble level is located on the side of the clamp to level out your horizon.