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: 6 x Grinding stone (type 1) 1/2-Inch diameter 6 x Grinding stone ( ) 3/8-Inch diameter tapered 6 x Grinding stone ( ) 3/8-Inch diameter 6 x Grinding stone (type 4) 3/4-Inch diameter mounted disc 72 x Cut off wheel (Red) 15/16-Inch 72 x Cut off wheel (Black) 15/16-Inch 20 x Felt polishing wheel (1/2-Inch) 8 x Polishing Cone (3/8-Inch tapered) 12 x Felt polishing wheel (1-Inch) 6 x 1 1/4"Abrasive Wheel 2 x Drum sander (1/2-Inch) x Sanding band (1/2-Inch) 12 x Steel wheel (3/4-Inch) 6 x Brass wheel (3/4-Inch) 12 x Steel cup (1/2-Inch) 6 x Brass cup (1/2-Inch) 2 x Dressing Stone wheel 4 x Colletts 4 x Mandrel (standard type) 4 x Mandrel (standard type) 390 x Sanding discs 3/4-Inch 10 Grinding Disc (use with seperate mandrel) 8 x Drill Set 2 x Polishing Compound