The manfrotto 546bk video tripod with 504hd head kit is the combination of the professional 504hd system with the middle spreader 546b tripod creating an extremely rigid and stable two stage system that is able to counterbalance equipment weight up to 75kg the 504hd 546bk has a die cast aluminium crown with a built in 75mm bowl the tripods telescopic mid level spreader helps set leg angles accurately leg locks are secure and reliable and spiked feet with rubber overshoes are provided for