COARSE, Extra long-lasting polishing points have silicon carbide, silicon dioxide, and aluminum oxide abrasive compound in a silicone 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-MP312-24 – Bullet – 5 x 16 mm – 24 pack A-MP319-24 – Flame – 4 x 12 mm – 24 pack A-MP333-24 – Flame – 8 x 18 mm – 24 pack A-MP347-24 – Ball Nose Taper – 8 x 20 mm – 24 pack A-MP361-24 – Flat Top Taper – 6 x 16 mm – 24 pack A-MP375-24 – Cylinder – 8 x 20 mm – 24 pack A-MP188-12 – Ball Nose – 13 x 18 mm – 12 pack A-MP382-12 – Knife Edge Wheel – 12 x 0.8 mm – 12 pack A-MP209-12 – Wheel – 2 x 2 mm – 12 pack