:) Designed specifically for panoramic photography, This rotator is designed with 0-360° panoramic scale, Combination of high precision, ease of use, compactness, Light weight, and durability.it can be used for 360° rotation panorama shooting and capture the full 360° panoramas. Absolutely essential for outdoor travelling photographers. :) Panoramic Head Made of durable aluminum alloy, durable and wear-resisting. The base screw hole is made of high-end stainless steel, solid enough to provide stronger stability; Load Capacity up to 22lb / 10kg. :) QR Clamp can be opened from 37mm to 42mm, it will accommodate any Arca style plate.Two lock knob will lock effectively and help move smoothly to allow for precise adjustments on the go. :) The bottom with 38mm wide standard dovetail QR plate compatible with most Arca-Swiss ball heads. Can be removable through the included wrench so that it can be installed on QR plate or used on the tripod or monopod directly. :) The bottom standard 3/8" threads (with 1/4-3/8" screw adapter) can be directly mounted on of devices, such as various professional tripods,monopods.