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