RODAC Circular Wire Cutting Brush Set includes 30 pièces. You will find: 6 wire brushes with 2½'' wavy wires and 6 of 1¾'', 6 circular wire brushes with 2'' wavy wires and 6 of 3'', 6 wire brushes with cylindrical wavy wires 1''. The rods are 1/4'' in size.