The Diablo 7/16 in. x 4 in. x 6 in. Rebar Demon SDS-Plus 4-Cutter Full Carbide Head Hammer Drill Bit is engineered for contractors and tradespeople who need reliable, fast, and precise drilling through reinforced concrete, standard concrete, brick, block, and rebar. Part of Diablo's revolutionary Rebar Demon lineup, this SDS-Plus hammer drill bit delivers a full carbide head design and advanced metallurgy that set it apart from conventional 2-cutter bits - making it the go-to choice for anchor setting in demanding structural applications where standard bits fall short.

Key Features

• Up to 7X longer life versus standard 2-cutter hammer drill bits - dramatically reduces bit replacement frequency and downtime on the job site, lowering cost per hole over time.
• Dura-Carbide with up to 2X more carbide material - withstands up to 1800 deg. Fahrenheit of intense heat compared to standard bits that fail at 800 deg. Fahrenheit, keeping the bit intact through rebar strikes and high-friction drilling.
• Impact Resistant 4-Cutter Full Carbide Head - extracts smaller bites of rebar for controlled, consistent carbide wear and reduced vibration, delivering fast and precise holes even in heavily reinforced concrete.
• Tri-Metal Fusion Welding with up to 3X stronger weld - keeps the full carbide head intact during extreme impacts such as rebar contact, preventing breakage in the most punishing hammer drilling conditions.
• Precision Tip geometry - provides the stability and accuracy needed for fast, precise holes in reinforced concrete, which is critical for reliable anchor setting.
• Optimized flute design removes dust faster - keeps the carbide head cooler during operation for ultimate bit strength and long-term durability across extended drilling sessions.
• Wear mark indicator - ensures precise hole depth control so anchor installations meet specification requirements every time.
• Optimized for both corded and cordless SDS-Plus rotary hammers - gives users flexibility to run the bit with their existing tool setup without compromise in performance.
• Made in the United States - domestically manufactured for consistent quality standards in professional-grade hammer drilling applications.

Why This Product

• When drilling into reinforced concrete where rebar contact is unavoidable, the 4-cutter full carbide head takes controlled, smaller bites of rebar rather than absorbing a full-force impact - this means reduced vibration, less operator fatigue, and a longer-lasting bit compared to standard 2-cutter designs.
• The ability to withstand up to 1800 deg. Fahrenheit of heat - more than double the heat tolerance of standard bits at 800 deg. Fahrenheit - means the carbide head maintains its integrity through the prolonged friction of concrete and rebar drilling, even with high-powered hammer drills.
• The Tri-Metal Fusion Welding process produces a weld up to 3X stronger than conventional methods, directly addressing one of the most common failure points in hammer drill bits: head separation during rebar impact.
• The combination of the wear mark indicator and Precision Tip design makes this bit a reliable tool for anchor setting in structural applications, where hole depth accuracy and clean entry are non-negotiable for load-rated fastener performance.

Specifications

• Brand: Diablo
• Sub-Brand: Rebar Demon
• Manufacturer Part Number: DMAPL4174
• Category: SDS-Plus 4-Cutter
• Diameter: 7/16 in.
• Length: 6 in.
• Working Length: 4 in.
• Shank: SDS-Plus
• Head Type: Full Carbide Head
• Number of Cutters: 4
• Compatible Tools: SDS-Plus Rotary Hammer Drill
• Compatible Materials: Reinforced Concrete; Concrete; Rebar; Brick/Block
• Pack Quantity: 1
• Country of Origin: United States

Approved Applications

• Reinforced concrete and concrete drilling for anchor setting and structural fastening

Frequently Asked Questions

What makes the Rebar Demon different from a standard 2-cutter hammer drill bit?

The Rebar Demon features a 4-cutter full carbide head rather than a standard 2-cutter design. This allows the bit to take smaller, more controlled bites when it contacts rebar, which reduces vibration, promotes even carbide wear, and delivers up to 7X longer life. Additionally, Diablo's Dura-Carbide formulation withstands up to 1800 deg. Fahrenheit of heat, compared to standard bits that fail at 800 deg. Fahrenheit.

Is this bit compatible with cordless SDS-Plus rotary hammer drills?

Yes. The Rebar Demon SDS-Plus bit is optimized for maximum performance in both corded and cordless SDS-Plus rotary hammer drills. The SDS-Plus shank design is standard across most compact rotary hammer platforms, making it a versatile option for job site use.

What is Tri-Metal Fusion Welding and why does it matter?

Tri-Metal Fusion Welding is Diablo's proprietary manufacturing process used to bond the full carbide head to the bit body. It produces a weld up to 3X stronger than conventional welding methods, which is critical for preventing head separation or breakage during high-impact situations such as striking rebar inside reinforced concrete.

What does the wear mark indicator do?

The wear mark indicator is a reference marking on the bit that helps the user maintain precise hole depth during drilling. This is especially important for anchor setting applications in reinforced concrete, where accurate hole depth is required to meet fastener load specifications and installation standards.