Qty 10 Felt Polishing Buffing Cone Tips with Mandrel #422 Dremel Proxxon Rotary 10-piece 3/8-inch felt polishing point with mandrel Dremel 422 style Self-renewing surface ensures that the felt polishing cone maintains its effectiveness Felt polishing bobs can be used with or without polishing compound Perfect for general polishing of most ferrous metals, stones, glass and ceramics