The Diablo Rebar Demon 5/8" x 6" x 8" SDS-Plus 4-Cutter Full Carbide Head Hammer Drill Bit is engineered for contractors and tradespeople who demand speed, durability, and precision when drilling into reinforced concrete and concrete. Built around Diablo's proprietary Dura-Carbide technology, this 4-cutter full carbide head bit is purpose-built to cut through rebar-laden concrete where standard hammer drill bits fall short - delivering up to 7X longer service life and maintaining performance even under extreme heat and high-impact conditions. Whether you are setting anchors in structural concrete or drilling through brick and block, this SDS-Plus bit provides the controlled, consistent performance required for demanding job site applications.

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 overall cost per hole.
• Dura-Carbide with up to 2X more carbide - withstands up to 1800 deg. Fahrenheit of intense heat versus standard bits that fail at 800 deg. Fahrenheit, keeping the bit cutting efficiently through rebar contact that would destroy conventional bits.
• Impact Resistant 4-Cutter Full Carbide Head - extracts smaller bites of rebar for controlled, consistent carbide wear and reduced vibration, producing fast, 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 impact such as rebar strikes, preventing catastrophic head loss and reducing the risk of costly bit failure mid-task.
• Precision Tip - delivers the stability and accuracy required for fast, precise holes, making it ideal for anchor setting applications where hole position is critical.
• Optimized flute design - removes dust faster, keeping the carbide head cooler for ultimate strength and durability, reducing heat buildup that contributes to premature wear.
• Wear mark indicator - ensures precise hole making so operators can maintain consistent hole depth without guesswork.
• Optimized for corded and cordless SDS-Plus rotary hammers - delivers maximum performance regardless of whether the tool is a corded high-powered unit or a cordless rotary hammer on the job site.

Why This Product

• Drilling into reinforced concrete risks damaging standard bits on rebar contact - the 4-Cutter Full Carbide Head and Dura-Carbide formula absorb rebar impacts with controlled wear rather than sudden failure, making this bit the practical choice for anchor setting in structural applications.
• With the ability to withstand up to 1800 deg. Fahrenheit - more than double the 800 deg. Fahrenheit threshold where standard bits fail - this bit stays productive through extended drilling sessions and high-friction rebar encounters without losing cutting efficiency.
• The optimized flute design actively clears debris and lowers operating temperature simultaneously, meaning the bit lasts longer per hole and per job compared to bits that allow heat and dust to accumulate at the cutting head.
• Sold individually in a pack quantity of 1, this bit fits standard SDS-Plus rotary hammer drills in both corded and cordless configurations, making it easy to stock and deploy exactly where rebar-rated drilling performance is needed.

Specifications

• Brand: Diablo
• Sub-Brand: Rebar Demon
• Model Number: DMAPL4220
• Category: SDS-Plus 4-Cutter
• Diameter: 5/8"
• Length: 8"
• Working Length: 6"
• Shank: SDS Plus
• Head Type: Full Carbide Head
• Number of Cutters: 4
• Compatible Tools: SDS-Plus Rotary Hammer Drill
• Materials: Reinforced Concrete; Concrete; Rebar; Brick/Block
• Pack Quantity: 1
• Country of Origin: Germany

Approved Applications

• Reinforced concrete and concrete drilling, including anchor setting in rebar-heavy structural applications

Frequently Asked Questions

What makes the Rebar Demon bit better suited for reinforced concrete than a standard 2-cutter hammer drill bit?

The Rebar Demon uses a 4-Cutter Full Carbide Head made with Dura-Carbide, which provides up to 2X more carbide material and withstands up to 1800 deg. Fahrenheit of heat - compared to standard bits that fail at 800 deg. Fahrenheit. This allows the bit to take controlled, smaller bites of rebar rather than sustaining sudden impact damage, resulting in up to 7X longer life and more consistent hole quality in reinforced concrete.

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

Tri-Metal Fusion Welding is the process Diablo uses to bond the full carbide head to the bit body. It creates a weld that is up to 3X stronger than standard welding methods, which means the carbide head stays intact during high-impact events such as striking rebar. This prevents head separation - one of the most common failure points for hammer drill bits used in reinforced concrete - and keeps the bit performing reliably through demanding applications.

Is this bit compatible with cordless 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 fits the standard SDS-Plus chuck found on most corded and cordless rotary hammer tools available today.

What does the wear mark indicator do?

The wear mark indicator is a visual reference built into the bit that helps operators maintain precise hole depth during drilling. Rather than relying on estimates or separate depth gauges, the user can monitor the wear mark to ensure consistent, accurate hole depth - which is especially important for anchor setting applications where hole depth directly affects load performance.