Designed for collecting debris when using a high-speed angle grinder. Perfect for tuckpointing and crack chasing. Accepts up to 5 in diameter blades. Rugged construction for heavy-duty applications. More than 90% of dust removal rate. Straight precise cuts using foot plate. Clear cover for better visibility. Easy installation and blade changes. Fits on selected 4-1/2 in and 5 in high-speed angle grinders. Adjustable cutting depth. Must be used with a vacuum.