30pcs 150Grit Diamond Grinding Bits Kit Different Head Shape Mixed Kit Tools for Electric Grinder Jades Carving Condition: Item Type: Grinding Bits Material: Diamond Color: As Pictures Shown Grit: 150 Grit Shank Diameter: Approx. 3mm/0.12in Length: Approx. 45mm/1.77inQuantity: 30pcs/set Bits Diameter: Shown as the chart NO. Head Shape specification NO. Head Shape specification 1 Inverted trumpet 3 x 45 x 2mm 16 Cylindrical flat head 3 x 45 x 3mm 2 3 x 45 x 2.5mm 17 3 x 45 x 3.5mm 3 3 x 45 x 3mm 18 Small tip with arc 3 x 45 4 Sphere 3 x 45 x 1.5mm 19 Flame shape 3 x 45 x 3mm 5 3 x 45 x 2.5mm 20 3 x 45 x 3mm 6 3 x 45 x 3mm 21 Bullet 3 x 45 x 3mm 7 Cylindrical flat head 3 x 45 x 1mm 22 Bullet 3 x 45 x 2.5mm 8 3 x 45 x 1.5mm 23 Big tip with arc 3 x 45 x 3mm 9 3 x 45 x 2mm 24 Conical 3 x 45 x 3mm 10 3 x 45 x 2.5mm 25 Flat cone 3 x 45 x 3mm 11 3 x 45 x 3mm 26 Needle 3 x 45 x 1.2mm 12 3 x 45 x 3.5mm 27 3 x 45 x 1.2mm 13 Cylindrical flat head 3 x 45 x 1.5mm 28 3 x 45 x 1.2mm 14 3 x 45 x 2mm 29 3 x 45 x 3mm 15 3 x 45 x 2.5mm 30 3 x 45 x 3mm