6Pcs/Set Diamond Grinding Wheel Grinding Head for Jade Ring Carving Bead Polishing

6 Pieces/set Diamond Grinding Point for Jade Wood Ring Curving Mesh: coarse around 80# /fine around #240 Shank diameter: the shank 2.35mm for 4mm, 5mm, 6mm, 8mm;;the shank 3mm for 8mm, 10mm, 12mm Grinding bit(ball) diameter: 4mm, 5mm, 6mm, 8mm, 10mm, 12mm Stanadard Package: 6pcs/set Application : Suitable for most rotary tools like dremel, die grinder with clamping size of 3mm. Widely used in grinding/polishing process of jade, ring curving