Dewalt 1/4" x 8-1/2" High Impact Full Head Carbide Drill Bits, SDS+ DW5518B25-SBD

Dewalt's 1/4" x 6" x 8-1/2" ELITE SERIES™ SDS PLUS Masonry Drill Bits designed for extreme longevity and high-speed performance in reinforced concrete. These bits feature a solid carbide head and IRON BLAST TECHNOLOGY™, providing up to 2x the life of standard bits while resisting structural fatigue and breakage when striking rebar.
Key Features
Solid Carbide Head: The 4-cutter design provides 2x more carbide surface area for superior durability and a longer lifespan in heavy-duty concrete applications.
Iron Blast Technology: A high-speed blasting process strengthens the bit's body to help resist fatigue and significantly reduce the risk of breakage during high-impact drilling.
Rebar Strike Resistant: Specially engineered head geometry allows the bit to maintain speed and resist damage even when encountering rebar.
2-Stage Flute Design: Features a variable helix pattern that rapidly pulls dust and debris away from the tip to maintain consistent drilling speeds.
Anchor Wear Mark Indicator: Includes a built-in indicator on the carbide tip to ensure the hole diameter remains within ANSI tolerances for secure mechanical anchor placement.
No Break Guarantee: DEWALT offers a replacement guarantee if the bit fails for any reason while the wear mark is still visible on the head.