This is an item for business contractors. This product is especially effective for processing that requires precision using a precision cutting machine with an extra level of precision. Compatible work: metal/non-metal; Compatible material examples: titanium, tungsten, glass variety; Abrasive material: GC; Outer diameter: 5.9 inches (150 mm); Thickness: 0.02 inches (0.5 mm); Inner diameter: 1.0 inches (25.4 mm); Quantity: 50 pieces