The Diablo Rebar Demon 5/32" x 4" x 6" SDS-Plus 4-Cutter Full Carbide Head Hammer Drill Bit is engineered for professionals who demand maximum durability, speed, and precision when drilling through reinforced concrete, concrete, rebar, and brick or block. Built with Diablo's proprietary Dura-Carbide technology and a Tri-Metal Fusion Welding process, this hammer drill bit is purpose-built to outlast standard 2-cutter bits and keep cutting even in the most punishing conditions where ordinary bits break down. Whether you are setting anchors in rebar-laden slabs or boring through masonry, this bit delivers fast, precise holes with controlled performance and extended tool life.

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 during rebar contact, compared to standard bits that fail at 800 deg. Fahrenheit, keeping the bit cutting when heat would otherwise destroy competitors.
• Impact Resistant 4-Cutter Full Carbide Head - takes smaller bites of rebar for controlled, consistent carbide wear and reduced vibration, delivering 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 impacts such as rebar strikes, preventing head separation and unexpected bit failure.
• Precision Tip design - provides the stability and accuracy required for fast, precise holes in reinforced concrete, which is critical when drilling for anchor setting applications.
• Optimized flute design - removes dust faster and keeps the carbide head cooler for ultimate strength and durability over extended drilling sessions.
• Wear mark indicator - ensures precise hole depth control so you always know exactly how deep you are drilling, reducing the risk of errors in anchor placement.
• Optimized for corded and cordless SDS-Plus rotary hammers - delivers maximum performance regardless of whether you are running a corded or cordless tool on site.

Why This Product

• When drilling through reinforced concrete or rebar, standard 2-cutter bits fail at just 800 deg. Fahrenheit - the Rebar Demon's Dura-Carbide handles up to 1800 deg. Fahrenheit, making it the right choice for demanding anchoring and structural drilling work where rebar contact is unavoidable.
• The 4-cutter full carbide head reduces vibration and delivers controlled wear, meaning less fatigue for the operator and more predictable results across an entire day of drilling in concrete or brick and block.
• With a 5/32" diameter and 4" working length in a compact 6" overall length, this bit is sized for precise anchor-setting holes where accuracy matters as much as speed.
• Made in Germany to Diablo's performance standards, this bit is engineered to pair with SDS-Plus rotary hammers - both corded and cordless - so it integrates directly into your existing tool setup without compromise.

Specifications

• Brand: Diablo
• Sub-Brand: Rebar Demon
• Model Number: DMAPL4020
• Diameter: 5/32"
• Length: 6"
• Working Length: 4"
• 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
• Anchor setting in reinforced concrete slabs and walls
• Drilling through or near rebar in concrete structures
• Brick and block masonry drilling

Frequently Asked Questions

What makes this bit different from a standard 2-cutter hammer drill bit?

The Rebar Demon uses a 4-cutter full carbide head instead of the standard 2-cutter design. This configuration takes smaller, more controlled bites of rebar, reducing vibration and delivering up to 7X longer life. The Dura-Carbide material also withstands up to 1800 deg. Fahrenheit of heat versus only 800 deg. Fahrenheit for standard bits, allowing it to keep cutting where standard bits would fail.

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

Yes. The Rebar Demon SDS-Plus hammer drill bit is optimized for maximum performance in both corded and cordless SDS-Plus rotary hammers. The SDS-Plus shank fits any standard SDS-Plus chuck without adapters.

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 up to 3X stronger than standard welding methods, which keeps the carbide head intact during extreme impact situations such as direct rebar contact. This prevents head separation and reduces the risk of sudden bit failure during use.

What does the wear mark indicator do?

The wear mark indicator is a visual reference built into the bit that lets you monitor drilling depth during use. This helps ensure precise hole making for anchor setting and other applications where a specific hole depth is required, reducing the chance of under-drilling or over-drilling.