ITEM NAME:Glass Diamondl Cutting Disc Fit Rotary Tool 100mm dia Description: Outside Diameter: approx. 4" (100mm) Arbor Hole: approx. 0.79''(20mm); Abrasive edge: approx. 15mm/0.6inch The Cutting Wheels are sharp and strong Perfect for cutting gemstones, glass, ceramics, porcelain, tiles, car.The Cutting Wheels are sharp and strong. High precision and smooth cutting. 1 Piece Cutting wheels. Arbor Hole: approx. 0.79"(20mm); Abrasive edge: approx. People always bought together with.