Set of 4 expanding drums that are 2” Long with the following diameter size: 1-1/2”, 1”, 3/4”, and 1/2”. Includes 3 different kind of sanding grits sleeves: 50, 80, and 120 grits (4pcs each). This is excellent for sanding holes, edges, contours and irregular shapes. Ideal to smooth out rough edge and surface, polish soft and hard materials. Recommended use for home improvement, artwork, woodworks, plastic and metal. Extra-long drums for working wider edges.