Bosch Concrete Drilling Shroud HDC250 SDSmax Core Bit Dust Collection Attachment (1 1 2 to 6 Inch Diameters Dual Air Chambers Universal Vacuum Mount) Pipe Cutters Titanium Coated HSS Construction: High speed steel Titanium Coated HSS Construction: High speed steel fortified with a wear resistant titanium finish extends operating lifespan and reduces frictional heat 5 inch overall length provides superior leverage for breaking loose rusted or seized bolts Adaptable Coring Footprint: Optimized to process standard 1 1 2 inch to 5 inch bits natively Universal Surface Clamping: Surface independent design relies entirely on vacuum suction