The DEWALT DWA58034 SDS MAX 3/4-inch Hollow Bit is part of DEWALT'S Perform & Protect product line, minimizing users' exposure to dust while drilling. When used with a dust extractor, DEWALT's Hollow Drill bit extracts dust while drilling for less dust, fast holes and fast adhesive anchor installation. Y-cutter carbide design for exact positioning, perfect starting & maximum durability. The bit is also OSHA Table 1 compliant. Connects directly to DEWALT's Airlock System forming a secure, locking connection between bit and dust extractor. Part of DEWALT's complete cordless anchoring solution. Specs: 3/4" Diameter, 23.75" Length, 15.75" Usable Length. Includes: 1 Bit.