The Vanguard ALTA BH-100 is a multi-action ball head that features three independent knob adjustments. The micro-adjustment fine-tuning knob gives you total control over ball friction for precise adjustments when composing your images. Need repositioning your camera quickly, easily, and accurately? The main locking knob has an easy-to-grip lever that?s oversized and can be repositioned easily for comfortable use. The Alta BH-100 has a durable aircraft-aluminum housing, weighs only a pound, and features a 22-lb. payload. Plus, you get 2 bubble levels for precision adjustments, a universal 38mm Arca-compatible plate with a D-ring 1/4? screw (QS-60 V2), as well as a built-in safety pin to prevent the risk of accidentally releasing your camera. The Alta BH-100 provides totally secure locking, so your gear stays in place, no matter the angle. An oxidization-anodized surface on the ball ensures it will remain scratch-free and provide ultra-smooth and precise movements