Bosch Drill Bit HCD2081 SDS Plus Speed Clean 1 2 x 9 Inch Hollow Concrete Masonry (Hollow Dust Extraction Core 4.25 In Usable Adhesive Anchor Boring) Rabbeting Bit and impact drivers on commercial and impact drivers on commercial jobsites Specification Value Brand Name Bosch Model Number PS41 2A Operating Voltage Rating 12V Max DC Battery Chemistry Type Lithium Ion (Two 2 Chemical Adhesive & Mechanical Anchor Installation: Boring 1 2 inch holes for concrete drop in anchors and structural fasteners while fulfilling clean hole standards without manual blow brush cycles Solid Carbide Two Cutter Head: Thermally brazed carbide cutting tip maintains hole diameter accuracy and provides service life comparable to solid drill bits