E.C. Moore Magnum Brass-Center Snap-On Snap-Off Plastic-Backed Aluminum Oxide Sanding Disc, 150-Grit Discs The bars are 1

The bars are 1

000rpm with very light pressure

semi-precious gemstones (with a Mohs hardness 4–7)

The groove allows you to shape ring mountings without damaging the setting

Use this solution with a platinized titanium anode

E.C. Moore Magnum Brass-Center Snap-On Snap-Off Plastic-Backed Aluminum Oxide Sanding Disc, 150-Grit Discs The bars are 1This E. C. Moore Magnum disc features the longest lasting oxide abrasive bonded on durable, reinforced plastic that ensures extended life. With their brass centers, these convenient Snap On Snap Off flexible discs can be changed instantly. Great for polishing non precious metals! Use discs with a snap on disc mandrel. Price Per Unit: Priced per Pack of 100 Material: Aluminum oxide Grit: 150 Wheel Diameter: 22. 2mm (. 874'') Brand: E. C. Moore Shipping