The Diablo Rebar Demon 3/16 in. x 2 in. x 4 in. SDS-Plus 4-Cutter Full Carbide Head Hammer Drill Bit is engineered for professionals who demand uncompromising performance when drilling through reinforced concrete, concrete, brick, and block. Built on Diablo's revolutionary approach to carbide hammer drill bit design, the Rebar Demon series delivers the durability, speed, and heat resistance that standard 2-cutter bits simply cannot match - making it the go-to choice for anchor setting and precision hole-making in demanding construction environments. Made in the United States, this bit is optimized for use with corded and cordless SDS-Plus rotary hammer drills.

Key Features

• Up to 7X Longer Life vs. Standard 2-Cutter Bits - dramatically reduces bit replacement frequency on the jobsite, lowering overall tooling costs and downtime.
• Dura-Carbide with Up to 2X More Carbide Material - withstands up to 1800 deg. Fahrenheit of intense heat, far exceeding the 800 deg. Fahrenheit threshold where standard bits fail, so the bit keeps cutting when others give out.
• Impact Resistant 4-Cutter Full Carbide Head - takes smaller, controlled bites of rebar for consistent carbide wear and reduced vibration, delivering fast and precise holes even in rebar-heavy concrete.
• Tri-Metal Fusion Welding with Up to 3X Stronger Weld - keeps the full carbide head intact during extreme impact situations such as rebar strikes, preventing catastrophic head loss and protecting both the bit and the operator.
• Precision Tip Design - provides stability and accuracy from the first contact with the surface, enabling fast, precise hole placement in reinforced concrete for reliable anchor setting.
• Optimized Flute Design for Faster Dust Removal - evacuates debris more quickly to keep the carbide head cooler during drilling, preserving ultimate strength and long-term durability in concrete and masonry applications.
• Wear Mark Indicator - gives the operator a clear visual reference to ensure precise hole depth is achieved every time, reducing guesswork on anchor installation.
• Compatible with Corded and Cordless SDS-Plus Rotary Hammers - offers maximum versatility across a wide range of jobsite tools and power sources.

Why This Product

• When drilling into rebar-reinforced concrete, standard 2-cutter bits fail quickly under the heat and impact stress - the Rebar Demon's 4-cutter full carbide head and Dura-Carbide formula handle rebar contact with controlled wear rather than sudden breakage, keeping your work moving forward.
• The combination of Tri-Metal Fusion Welding and a full carbide head means the bit resists both heat buildup and physical shock, giving professionals confidence in high-powered hammer drill applications where bit failure is costly and dangerous.
• At 3/16 in. diameter with a 2 in. working length and 4 in. overall length, this bit is sized for precise anchor-setting holes in concrete and masonry where accuracy and fit are critical to structural performance.
• Manufactured in the United States and sold individually, this bit is a reliable, single-unit solution for contractors and tradespeople who want proven Diablo quality without committing to a multi-pack when only one size is needed.

Specifications

• Brand: Diablo
• Model Number: DMAPL4030
• Sub-Brand: Rebar Demon
• Category: SDS-Plus 4-Cutter
• Diameter: 3/16 in.
• Working Length: 2 in.
• 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 precision hole-making

Frequently Asked Questions

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

Unlike standard 2-cutter bits that fail at around 800 deg. Fahrenheit, the Rebar Demon uses Dura-Carbide with up to 2X more carbide material that withstands up to 1800 deg. Fahrenheit of heat. Its 4-cutter full carbide head takes smaller bites of rebar for controlled wear and reduced vibration, resulting in up to 7X longer life compared to standard 2-cutter hammer drill bits.

Will this bit work with my cordless SDS-Plus rotary hammer?

Yes. The Rebar Demon 3/16 in. SDS-Plus bit is optimized for maximum performance in both corded and cordless SDS-Plus rotary hammers. Its SDS-Plus shank interfaces with any standard SDS-Plus chuck, whether on a corded or battery-powered tool.

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

Tri-Metal Fusion Welding is Diablo's proprietary process used to bond the full carbide head to the bit body. It produces a weld that is up to 3X stronger than standard methods, which keeps the carbide head from breaking away during the extreme impact of hitting rebar inside concrete - protecting both the bit and the integrity of the hole being drilled.

What materials can this hammer drill bit cut through?

This bit is designed to drill through reinforced concrete, concrete, rebar, brick, and block. The 4-cutter full carbide head and optimized flute design make it particularly effective in reinforced concrete applications where rebar contact is likely.