Premium Diamond Abrasive Grinding Stones for Zirconia & All Ceramic Dental Materials Kit includes 7 Shapes. Fine Grit // Shape: 7 Shapes // Size: ø 12.50 x 5.32 mm // Shank: 2.35mm / HP // Max. Speed: 10,000 RPM Kit includes one of each Concave, Knife, Wheel, Bullet, Taper, Barrel & Inverted Type