Features: brand new and high quality. Application: Suitable for grinding and processing of gray cast iron, ductile iron, stainless steel,glass, jade, stone and other materials. Features: Not easy to lose sand, integrated molding, high density, long life, more wear-resistant. for Head Shape: Cylindrial, Bullet for Sharp. Material: Emery, with high hardness and the shape reminds well. Shank Diameter: 1/4"(6mm). Specifications: Material: Emery Size: approx inches Bullet for Sharp 8x6mm: approx 60x8x6x30mm/2.36x0.31x0.24x1.18 inches Cylindrical Flat Bottom 12x6mm : approx 60x12x6x30mm/2.36x0.47x0.24x1.18 inches Cylindrical Flat Bottom 15x6mm : approx 60x15x6x30mm/2.36x0.59x0.24x1.18 inches Cylindrical Flat Bottom 20x6mm : approx 60x20x6x30mm/2.36x0.79x0.24x1.18 inches Cylindrical Flat Bottom 25x6mm : approx 60x25x6x30mm/2.36x0.98x0.24x1.18 inches Bullet for Sharp 10x6mm : approx 60x10x6x30mm/2.36x0.39x0.24x1.18 inches Bullet for Sharp 13x6mm : approx 60x13x6x30mm/2.36x0.51x0.24x1.18 inches Bullet for Sharp 15x6mm : approx 60x15x6x30mm/2.36x0.59x0.24x1.18 inches Bullet for Sharp 20x6mm : approx 60x20x6x30mm/2.36x0.79x0.24x1.18 inches Bullet Round for Head 10x6mm : approx 60x10x6x30mm/2.36x0.39x0.24x1.18 inches Bullet Round for Head 13x6mm : approx 60x13x6x30mm/2.36x0.51x0.24x1.18 inches Bullet Round for Head 20x6mm : approx 60x20x6x30mm/2.36x0.79x0.24x1.18 inches Cylindrical Flat Bottom 10x6mm : approx 60x10x6x30mm/2.36x0.39x0.24x1.18 inches Note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1x 6MM Shank Grinding for Head