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4-1/4" Core Drill Bit with Pilot Bit & Adapters(SDS Plus and 1/2" Hex), 5/8"-11 Thread, 9.5" Depth, Upgraded-Welded Segments Diamond Core Bits for Concrete, Masonry, Brick Block
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Grade
Analysis Confidence
23%
🏷️ Price includes Coupon savings
⚠️ Price may have changed. Last updated 24+ hours ago — confirm on Amazon.
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Price verified Sep 26, 2026 7:08 AM · Prices & availability subject to change
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📝 Product Overview
🏪 Sold by
DaduoRi
📦 Fulfillment
Fulfilled by Amazon
🚚 Shipping
Free Shipping
Product Details
✓Complete Package - Includes 1 pilot bit, 1 drift key, 2 x 5/8"-11 thread adapters ( SDS Plus & 1/2" hex shank), 3 dust collection bags (keep your workspace clean), a user manual, and a dry core drill bit ( 4-1/4" diameter, 5/8"-11 thread, max working depth: 9.5")
✓Precision Design & Quick Positioning - Comes with a guiding pilot bit, The sharp pilot tip penetrates surfaces fast for more accurate positioning. Designed with a precise length,this center drill bit helps you position rapidly.After positioning, Use the drift key to remove the pilot bit, then continue to drill
✓Advanced Cutting Segment Formula - Featuring a newly cutting segment, this core drill bit drills efficiently through light concrete, masonry, brick wall, mortar, cinder block. Concrete foundation is not suitable, We recommend use our pro wet core drill bit, find it in DaduoRi store
✓Upgraded Segments Welding - Reinforced construction minimizes tooth breakage (ROTATION mode only). Our core bits are engineered to simplify drilling tasks for both professionals and DIYers
✓Engineered for stability and smooth work. The balanced core drill body minimises vibration for cleaner cuts, making it suitable for creating neat openings for ventilation ducts, extractor fans, and pipework. For best results and extended diamond core bit life, use with water for cooling when drilling
⚙️ Specifications
Cutting Diameter
10.8 centimeters
Shank Type
Threaded
Brand
DaduoRi
Tool Flute Type
Straight
Surface Recommendation
Brick, Concrete, Masonry
Brand Name
DaduoRi
Model
4.25 inch core drill bits with center-YL
Set Name
DaduoRi 4-1/4" Core Drill Bit with Pilot Bit & Adapters Set
Unit Count
1 Count
Manufacturer
DaduoRi Tool
Part Number
4-1/4"Dry Core Bit-Pilot Bit
