Product Catalog Catalog Contractor Concrete Core Drill View as: Display items as thumbnails Display items as a list 5in. Hilti Diamond Core Bit Manufacturer: Hilti Group Model Number: DDB4/17ULC 4in. Hilti Diamond Core Bit Manufacturer: Hilti Group Model Number: DDB4/17ULC 2in. Hilti Diamond Core Bit Manufacturer: Hilti Group Model Number: DDB2/17UCL Hilti Core Drill with Stand Manufacturer: Hilti Group Model Number: DD150U