Discs rack We have two kinds of discs racks for your choice. The discs rack A is movable and it has an aluminum magnesia powder bucket. IWF certified. Zhangkong Brand zhangkong weightlifting equipment has been once used in many world championshps like 2008 beijing olympic games, 2006 world junior weightlifting championships; 2006 midterranean weightlifting championships; and 2007 asian weightlifting championships.