RIDGID V-Tech Multi-Cutting Diamond Blade are engineered with top-grade industrial diamonds for maximum cutting performance and superior cutting life. V-Tech Vacuum Brazing Technology provides 100X more life than standard abrasives. Unlike traditional abrasive cut-off blades the RIDGID V-Tech Multi-Cutting Blades have a solid steel core which makes it safer to use and reduces sparks, dust and debris. These blades are for use on a wide range of materials Tile, Metal/Steel, Masonry, Laminate, Fiber Cement and PVC. This 4.5 in blade wheel will fit 4.5 in. angle grinders with a 7/8 in. or 5/8 in.-11 threaded arbor. Can be used wet or dry.