Standard 3 / 8 " top external and 3 / 8 " bottom screw thread, which is for different types of tripods Large load capacity but lightweight in design, portable to carry, perfect for outdoor travelling photographers Exquisite workmanship, aluminum alloy made, processing, surface oxidation treatment, for long service life Professional photography accessories, widely used for leveling in portrait video 3 Fine tuning knobs enable to up to + / 5 degrees in horizontal, wear-resistant rubber pad and the locking designed dials the camera perfectly leveled for stable photography