The Diablo Rebar Demon 7/8" x 8" x 10" SDS-Plus 4-Cutter Full Carbide Head Hammer Drill Bit is engineered for professionals who demand maximum durability and speed when drilling through reinforced concrete, concrete, brick, and block. Built around Diablo's proprietary Dura-Carbide technology, this SDS-Plus bit withstands up to 1800 deg. Fahrenheit of intense heat - more than double the threshold of standard bits - making it one of the most capable hammer drill bits available for demanding anchor-setting and concrete-drilling applications. Whether you are working with a corded rotary hammer or a cordless SDS-Plus tool, this Rebar Demon bit delivers fast, precise holes with extended service life.

Key Features

• Up to 7X longer life versus standard 2-cutter hammer drill bits - dramatically reduces how often you replace bits on the job, lowering your cost per hole in reinforced concrete applications.
• 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 when rebar strikes occur.
• Impact Resistant 4-Cutter Full Carbide Head - extracts smaller bites of rebar for controlled, consistent carbide wear and reduced vibration, resulting in faster and more precise holes through reinforced concrete.
• Tri-Metal Fusion Welding with up to 3X stronger weld - keeps the full carbide head securely bonded during extreme impact events such as rebar hits, preventing breakage and heat-related failure.
• Precision Tip design - delivers the stability and accuracy required for fast, precise holes, which is critical for reliable anchor setting in reinforced concrete.
• Optimized flute design removes dust faster - keeps the carbide head cooler during drilling for ultimate bit strength and long-term durability across high-volume drilling tasks.
• Wear mark indicator - allows the user to gauge hole depth accurately, ensuring precise hole making without over-drilling.
• Optimized for corded and cordless SDS-Plus rotary hammers - gives you maximum performance flexibility across your existing tool inventory without any adapter needed.

Why This Product

• Drilling into rebar-reinforced concrete destroys standard 2-cutter bits quickly - this 4-cutter full carbide head is specifically designed to take controlled bites of rebar, reducing vibration and delivering up to 7X longer service life instead of premature failure.
• Standard bits fail at 800 deg. Fahrenheit, which means frequent rebar contact causes rapid breakdown - Diablo's Dura-Carbide technology in this bit tolerates up to 1800 deg. Fahrenheit, giving you consistent performance in the most heat-intensive drilling conditions.
• The Tri-Metal Fusion Welding process creates a weld up to 3X stronger than conventional methods, so the carbide head stays intact under the repeated high-energy impact of powerful rotary hammers - reducing the risk of catastrophic bit failure mid-task.
• The optimized flute design actively clears dust from the hole during drilling, keeping the cutting head cooler and reducing the need to repeatedly withdraw the bit - meaning faster hole completion in concrete and brick applications.

Specifications

• Brand: Diablo
• Model Number: DMAPL4280
• Sub-Brand: Rebar Demon
• Category: SDS-Plus 4-Cutter
• Diameter: 7/8"
• Length: 10"
• Working Length: 8"
• Shank: SDS Plus
• Head Type: Full Carbide Head
• Number of Cutters: 4
• Compatible Tools: SDS-Plus Rotary Hammer Drill
• Materials Drilled: Reinforced Concrete; Concrete; Rebar; Brick/Block
• Pack Quantity: 1
• Country of Origin: Germany

Approved Applications

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

Frequently Asked Questions

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

The Rebar Demon uses a 4-cutter full carbide head rather than a standard 2-cutter configuration. This design takes smaller, more controlled bites of rebar, reducing vibration and delivering controlled carbide wear. The result is up to 7X longer bit life compared to standard 2-cutter hammer drill bits - a significant advantage when drilling frequently through rebar-reinforced concrete.

Can this bit handle direct contact with rebar without breaking?

Yes. The Rebar Demon is specifically engineered for rebar-reinforced concrete. The Dura-Carbide head withstands up to 1800 deg. Fahrenheit of intense heat generated during rebar contact - more than twice the 800 deg. Fahrenheit threshold at which standard bits fail. Additionally, Tri-Metal Fusion Welding keeps the carbide head securely bonded under extreme impact, resisting breakage even during direct rebar hits.

Is this bit compatible with cordless rotary hammer drills?

Yes. The Diablo Rebar Demon SDS-Plus bit is optimized for maximum performance in both corded and cordless SDS-Plus rotary hammers. The SDS-Plus shank design ensures it locks securely into any compatible SDS-Plus tool, delivering consistent drilling performance regardless of whether your rotary hammer is corded or battery-powered.

What does the wear mark indicator do?

The wear mark indicator is a reference point built into the bit that helps you gauge hole depth during drilling. It ensures precise hole making by giving you a clear visual cue, so you can achieve accurate, consistent depth - particularly important when setting anchors in concrete where hole depth tolerances matter.