Alpha Tools Quad Flush Cutting Diamond Blades Alpha Tools Quad blade is designed for flush cutting with high-speed angle grinders on difficult-to-cut materials such as natural stone and granite. This blade is popular for stone fabricators and sculptors for constant cutting but works great for general contractors who want to turn their angle grinder into a flush-cutting tool. Features A Quad adapter is required to use with high-speed angle grinders Chip-free cutting on the most demanding applications The blade is specially designed for flush cutting For use on high-speed angle grinders These blades are designed for wet or dry cutting Alpha Tools Quad Diamond Blade Specifications Model DA04AH DA05SH DA06AH DA07AH DA08AH DA09AH DA11AH Blade Size 4" 5" 6" 7" 8" 9" 10" Rim Height 8 mm 8 mm 8 mm 8 mm 8 mm 8 mm 8 mm Arbor 20 mm Quad Drive 20 mm Quad Drive 20 mm Quad Drive 20 mm Quad Drive 20 mm Quad Drive with 8 holes 20 mm Quad Drive with 8 holes 20 mm Quad Drive with 8 holes RPM 14,500 12,200 10,100 8,400 7,400 6,600 5,900 Kerf 2.1 mm 2.1 mm 2.1 mm 2.3 mm 2.3 mm 2.5 mm 2.5 mm Material Performance Ceramic Not Recommended Porcelain Fair Marble Not Recommended Granite Excellent Hard Granite Excellent Glass Not Recommended