These flap discs are manufactured using material, complete 350pcs rotary accessories kit includes everything you need. Great for all types of detail work in both hard and delicate materials. Features - ColorAssorted Color - Material: . - Size: 3.5 x 2.5 x 2.5cm - Suitable for most ferrous and non-ferrous metals, castings, welded joints, rivets, rust, stone, glass - Great for all types of detail work in both hard and delicate materials. - Accessories for fine detail work on jade, ceramic, glass, wood, hardened steel, cast iron, stainless - Accessories for working in metals, plastics, fiberglass and wood. Also includes collects and mandrels for use with the above accessories. Package list: 3 x Grinding stone (type 1) 1/2-Inch diameter 3 x Grinding stone ( ) 3/8-Inch diameter tapered 3 x Grinding stone ( ) 3/8-Inch diameter 3 x Grinding stone (type 4) 3/4-Inch diameter mounted disc 36 x Cut off wheel (Red) 15/16-Inch 36 x Cut off wheel (Black) 15/16-Inch 10 x Felt polishing wheel (1/2-Inch) 4 x Polishing Cone (3/8-Inch tapered) 6 x Felt polishing wheel (1-Inch) 3 x 1 1/4"Abrasive Wheel 1 x Drum sander (1/2-Inch) 12 x Sanding band (1/2-Inch) 6 x Steel wheel (3/4-Inch) 3 x Brass wheel (3/4-Inch) 6 x Steel cup (1/2-Inch) 3 x Brass cup (1/2-Inch) 1 x Dressing Stone wheel 2 x Colletts 2 x Mandrel (standard type) 2 x Mandrel (standard type) 195 x Sanding discs 3/4-Inch 5 Grinding Disc (use with seperate mandrel) 4 x Drill Set 1 x Polishing Compound