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

Complete Core Drill Set – Includes 1 dry core drill bit (OD:3 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 bit—compatibility 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

The DaduoRi Core Drill Bit Pilot Bit Adapter Set is a professional tool kit designed for efficient and precise drilling in masonry, brick, stucco, concrete, and low to medium-reinforced structures. The coring set includes: 1 dry core drill bit (3 inch OD) 1 center pilot bit for accurate alignment 1 drift key + 3 adapters (5/8"-11 thread to SDS Max/Plus & 1/2" Hex shank) 1 User Manual (Digital manual also available) Key Features: ✔ Upgraded-welded segments for durability (rotation mode only) ✔ Precision Design - Quick-start pilot bit for stable drilling and alignment ✔ Instant Positioning - Pilot bit eliminates pre-drilling for smooth operation, no mode switching ✔ Upgraded High-Hardness Teeth - Drills reinforced concrete in dry mode 9.5-inch deep drilling core bit with 5/8"-11 thread connection Tool Compatibility Compatible With: Rotary hammer drills (ROTATION MODE ONLY) Standard drills with 1/2" chuck SDS-Plus systems (using included adapter) Critical Warnings: NEVER use hammering function Only use provided adapter and pilot drill bit (no good compatible with other brands) Check that core bit, adapter, and drill are securely fastened and concentric (using a torque wrench) Cooling Methods: Preferred: Use continuous water feed (attach water bottle or connect to supply)