Bristles disc suit for deburring, cleaning, finishing and polishing detailed parts, tiny areas and irregular places more effectively with no scrach Discs Diameter 1 Inch,Shank Diameter 3mm/2.35mm. These radial bristle brushes are Perfect for jewelry making, hobby and craft, metalworking, wood carving and DIY making project. These detail abrasive brushes have good elasticity and toughness Shank diameter: . 3mm (1/8 inch) / 2.35mm (0.092 inch) Bristle disc Diameter: . 1 inch(2.54cm) Type: Abrasive Disc : Metalworking Material:Nylon + metal colour:Multicolor Package Contents: 56 * Radial Bristle Disc 8 * Rod Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.