Features: Double-track rail design to increase the sliding effect, smooth and fast. 1/4 thread design on top of the quick release plate. Comes with a screw adapter(1/4 to 3/8) to meet your needs better. The mini gradienter is used to help you find the balance quickly. 1/4 and 3/8 standard thread hole design on the rail for connection with other video accessories, such as tripod, ball-head ect. You can lock the plate via the lock, more stable. Special foot design, more anti-skid and stable. High-quality aluminum alloy, giving it exceptional strength for heavy duty work.