TARION Connect Adapter Mount with Quick Release Plate for Manfrotto 577 Tripod Head and DSLR Video Camera Stabilizer Slider It includes a connect adapter and a quick release plate. The 1/4" & 3/8" screws on the quick release plate allow for installing the DSLR or video cameras. The anti-slip pad can well protect your camera. It is equipped with a bubble level for angle adjustment. The 1/4" or 3/8" thread holes on the bottom fit for fixing the tripod, tripod head, stabilizer or slider easily. The 1/4" or 3/8" thread holes on one side fit for fixing other accessory. Material: Aluminum alloy. Dimension: approx. 120x75x22mm/4.7x3.0x0.9". Suitable for:DSLR, Video Camera, Stabilizer, Tripod or Slider, etc. Manfrotto 577 Tripod Head: 501,500AH, 701HDV, 503HDV, Q5.