DYH-120TRON Leveling Base with clamp and large-format plateThis is SUNWAYFOTO the first Lever Release Clamp. It's unique and very easy to install on and remove from the Platform. You only need to take two 1 4 20 camera screws to install the Clamp onto the Leveling Base ( the clamp central hole is non thread). If you have attached a Quick Release Plate to your camera, then you can experience the fast lock and release. Model: DYH 120TRON Top Diameter: 120mm Base: 86mm Weight: 977g Height: 72mm Mount hole: UNC3