EXTRA FINE, polishing points have silicon carbide, silicon dioxide, and aluminum oxide abrasive compound in a rubber binder. They leave a smooth finish on precious metals, stone, and ceramics. 3/32? (2.35 mm) shank Mounted Points in nine different shapes Sold in Multi-Packs (listed below): packs of 12 or 24 of a single shape. 5,000 –12,000 RPM Max Speed Head diameter x length listed in mm below. Part No. – Shape – Head: Diameter x Long – Quantity A-MP081-24 Cylinder 3 x 7 mm – 24 pack A-MP082-24 Cylinder 5 x 12 mm – 24 pack A-MP083-24 Bullet 5 x 16 mm – 24 pack A-MP084-24 Flame 3 x 7 mm – 24 pack A-MP087-24 Taper 6 x 16 mm – 24 pack A-MP088-24 Inverted Cone 9 x 8.5 mm – 24 pack A-MP092-12 Wheel 23 x 1 mm – 12 pack A-MP094-12 Wheel 15 x 2 mm – 12 pack A-MP097-12 Wheel 15 x 0.8 mm – 12 pack