The Avenger A9000N 100 mm Ø braked wheels are designed to fit chrome steel and chrome aluminum stands with square legs which are 20 mm x 20 mm (0.8 inch x 0.8 inch) or 25 mm x 25 mm (0.98 inch x 0.98 inch). This set of 3 braked wheels comes complete with the mounting hardware and the locking screw and nut. These wheels fit many stands such as Avenger combo stands and Combi Boom stands. Recommended Accessories: G100-2, G200-1, 087WBK, A1020CS, A1035CS, A1045CS, A4050CS, A3042CS, C1575B, E600, C500.