Size: Diameter 4.5''(115mm), Bore 7/8''(22.23mm), with a washer 7/8''-5/8''(22.23mm-15.875mm), Diamond Segment Height 25mm, Segment Thickness 1.7mm, Diamond Grit #60/70 Application: Suitable for dry/wet cutting and grinding of Porcelain Ceramic Tile Marble Granite Artificial stone Quartz, etc. Straight cutting, oblique cutting, edge grinding and horizontal groove grinding are available Triangular Head Design: Double-side 25mm triangular diamond height, fast, smooth cutting and grinding, chip-free, high efficiency Hot Pressing Sintering Process: Hot Pressed Technology provides longer working life. High quality diamond grains with a high strength steel matrix, sharp and wear-resistant, provide stronger hardness, better toughness, more stable and safe Recommended Machine: Angle Grinder, Circular Saw. Recommended speed 8000RPM, maximum speed 13200RPM