The Diablo Rebar Demon 1/2" x 24" x 29" SDS-Max 4-Cutter Full Carbide Head Hammer Drill Bit is engineered for professionals who demand maximum durability and speed when drilling through reinforced concrete, standard concrete, brick, and block. Featuring Diablo's proprietary Dura-Carbide formulation and a full carbide head secured by Tri-Metal Fusion Welding, this SDS-Max rotary hammer bit delivers up to 7X longer service life compared to standard 2-cutter bits - making it the go-to choice for high-volume anchor setting and heavy-duty structural drilling applications.

Key Features

• Up to 7X longer life versus standard 2-cutter hammer drill bits - fewer bit changes on the job site means more time drilling and less downtime replacing worn tooling.
• 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 even after repeated rebar strikes.
• Impact Resistant 4-Cutter Full Carbide Head - extracts smaller bites of rebar for controlled, consistent carbide wear and reduced vibration, delivering fast, precise holes through reinforced concrete without sacrificing bit integrity.
• Tri-Metal Fusion Welding with up to 3X stronger weld - keeps the full carbide head intact during extreme impact such as rebar contact, preventing catastrophic head loss and protecting the operator and work surface.
• Precision Tip for stability and accuracy - provides the alignment required for fast, precise holes in reinforced concrete, which is critical for accurate anchor setting and structural fastening.
• Optimized flute design removes dust faster - keeping the carbide head cooler during operation for ultimate strength and durability, and reducing the risk of heat-related premature wear.
• Wear mark indicator - ensures precise hole depth control so every hole meets spec without guesswork or over-drilling.
• Optimized for corded and cordless SDS-Max rotary hammers - delivers maximum performance whether you are running a high-powered corded unit or a modern cordless platform on the job site.

Why This Product

• Drilling through rebar-reinforced concrete destroys ordinary bits quickly - this bit's Dura-Carbide head handles temperatures up to 1800 deg. Fahrenheit, more than double the heat tolerance of standard bits, making it the right tool when rebar hits are unavoidable.
• The 4-cutter full carbide head takes controlled, smaller bites of rebar rather than absorbing full impact in a single contact point, which translates directly to reduced vibration for the operator and extended bit life on demanding commercial and industrial concrete work.
• With a 24" working length and 29" overall length, this 1/2" SDS-Max bit reaches deep into thick concrete slabs and walls where shorter bits cannot - ideal for through-bolt and anchor installations in heavy structural applications.
• Produced in Germany with Tri-Metal Fusion Welding, the carbide head bond is up to 3X stronger than standard welding methods, providing confidence that the head will not separate under the stress of high-powered SDS-Max rotary hammer drilling.

Specifications

• Brand: Diablo
• Manufacturer Part Number: DMAMX1040
• Category: SDS-Max 4-Cutter
• Diameter: 1/2"
• Overall Length: 29"
• Working Length: 24"
• Shank: SDS Max
• Head Type: Full Carbide Head
• Number of Cutters: 4
• Compatible Tools: SDS-Max Rotary Hammer Drill
• Compatible Materials: Reinforced Concrete; Concrete; Rebar; Brick/Block
• Pack Quantity: 1
• Country of Origin: Germany

Approved Applications

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

Frequently Asked Questions

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

This Rebar Demon bit uses a 4-cutter full carbide head rather than the 2-cutter design found on standard bits. The additional cutters take smaller bites of rebar, resulting in controlled carbide wear, reduced vibration, and up to 7X longer bit life. The Dura-Carbide material also withstands up to 1800 deg. Fahrenheit of heat - more than double the 800 deg. Fahrenheit threshold where standard bits fail.

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

Yes. This bit is optimized for maximum performance in both corded and cordless SDS-Max rotary hammer drills. The SDS-Max shank provides the secure, tool-free bit retention that SDS-Max rotary hammers require.

What does Tri-Metal Fusion Welding mean for bit durability?

Tri-Metal Fusion Welding is Diablo's proprietary process that bonds the full carbide head to the bit body with up to 3X the strength of conventional welding methods. This prevents the carbide head from separating or breaking away during extreme impact situations such as repeated rebar strikes, maintaining bit integrity and operator safety throughout demanding drilling operations.

What is the working length versus the overall length of this bit?

This bit has a 24" working length - the actual drilling depth the flutes can clear - and a 29" overall length including the SDS-Max shank. The additional length beyond the working length is taken up by the shank engagement in the rotary hammer, which is why the total bit length is 29" while the usable drilling depth is 24".