Abrasive "Blue Discs" Pin-Hole

Zirconia Alumina Discs are ideal for use with platinum, gold and silver. Far superior to other abrasives, they aggressively cut and grind with uniform precision. Last 2 to 3 times longer than conventional abrasives. Lubricate with water. 3/4" diameter. Pin-Hole centers. Price per 100 discs.