At just under 3.0 lb, the Manfrotto 057 Magnesium Ball Head with RC4 Quick Release is an ideal mate to Manfrotto 475 Digital Pro, 058B Triaut and Triman tripods, as well as 057 series carbon fiber and Mk2 tripods. Thanks to the marriage of imagination and technology this brawny head provides extremely precise movements, ergonomic handling and innovative features like a 90 – 105° portrait angle selector and built-in bubble level. Despite its very light weight for its class, and low profile, it is capable of supporting up to 33 lb (15 kg). The included RC4 Quick release system with its locking plate and twist-resistant surface provides speed, balance and security.