4-1/2" Pro Dry Core Drill Bit with Pilot Bit & 3 Adapters (SDS Plus/SDS Max/1/2 Hex), Upgraded-Welded Core Bits for Concrete with Rebar, Masonry, Brick, Mortar - 9.5" Depth, 5/8"-11 Thread

Complete Core Drill Set Includes 1 dry core drill bit (OD:4 1/2 inch), 1 pilot bit, 1 drift key and 3 adapters (5/8"-11 male thread to SDS Max/Plus & 1/2" Hex) for compatibility with most standard drills and hammer drills. (For best results, use included adapters with guiding bitcompatibility with other brands may vary. See the user manual) | Precision Design & Instant Positioning - No need pre-drilling guide bit by DaduoRi designed, enabling seamless start-to-finish operation without mode switching. The sharp pilot tip instantly penetrates surfaces for faster, more accurate positioning. Important: Remove center bit after positioning | Improved Cutting Segment Formula Features a newly cutting segment with higher durability, this core drill bit with pilot bit effectively drills through low to medium-reinforced concrete. (Tested on 8" thick concrete with 12mm rebar 8-10 holes per bit.) | Upgraded-Welded Segments - Reinforced construction minimizes tooth breakage (ROTATION mode only). DaduoRi's coring bits alaways design to simplify drilling tasks for both professionals and DIYers | Compatible Materials: This concrete core bit drills efficiently through brick, mortar, cinder block, and low to medium-reinforced concrete with rebar, making it suitable for HVAC, plumbing work