This BlueSpot 31 piece Sanding and Grinding Accessory Set comprises the following:

10 x 3/4in Sanding discs.
1 x Mandrel.
2 x Sanding shanks: 1/4in, 1/2in.
14 x Sanding bands: 1/4in (x8), 1/2in (x6).
2 x Aluminium oxide grinding stones.
2 x Silicone carbide grinding stones.