Bosch SDS max Drill Bit DXS5060 1 1 8 Inch x 17 In Speed Clean Hollow Concrete Carbide Tipped 4 Cutter Dust Extraction Rotary Hammer Laser Level Microfine Depth Adjustment: Provides precise Microfine Depth Adjustment: Provides precise bit depth control on both plunge and fixed bases for exact routing depths Utility Vault Maintenance: Efficiently pumping out accumulated runoff from underground utility and maintenance boxes Brick Country of Origin Germany Pro Tip: Check the hollow core opening periodically and verify your dust extractor filter auto clean pulse cycle is active to prevent fine wet concrete sludge from restricting suction during continuous deep anchor drilling The Bosch DXS5060 is a 1 1 8 inch by 17 inch SDS max hollow carbide tipped rotary hammer drill bit designed to extract airborne concrete dust directly through its internal steel core while drilling