The TH-40S Low-Profile High Locking-Strength Ball Head from Sunwayfoto has a profile compared to traditional ball head designs, providing a lower center of gravity for better stability. It has a robust load capacity of 44 pounds, and adjustable friction control. The 360° panoramic base features a numbered scale for precise, repeatable results, and an independent locking knob. The large 40mm ball provides smooth movement and can be positioned 90° for vertical orientation. The Arca-type quick-release set has a precision numbered scale and a bubble level, and includes a quick release plate.