The Manfrotto 351MV Ball Tripod w/Spikes is a 75mm aluminum tripod with tandem upper legs and single lower legs that provide a firm foundation for medium- to large-sized camcorders. With twin spiked feet to keep the legs from slipping on outdoor surfaces, along with the ability to set each leg at a variety of angles, the 351MV offers a versatile and solid means of support for your camera and accessories. Compatible with pro video heads such as the 519 and 504HD.