The Diablo 1" x 24" x 29" Rebar Demon SDS-Max 4-Cutter Full Carbide Head Hammer Drill Bit is engineered for professionals who demand superior performance when drilling through reinforced concrete, standard concrete, brick, and block. Diablo designed this hammer drill bit from the ground up to outlast, outpace, and run cooler than conventional 2-cutter bits, making it the go-to choice for anchor setting and heavy-duty concrete work where rebar contact is unavoidable. With a 29" overall length, a 24" working length, and a 1" diameter, this SDS-Max bit delivers the reach and cutting capacity needed for deep-hole applications in demanding construction environments.

Key Features

• Up to 7X longer life versus standard 2-cutter hammer drill bits - dramatically reduces bit replacement frequency and downtime on the job
• Diablo Dura-Carbide features up to 2X more carbide that withstands up to 1800 deg. Fahrenheit of intense heat to combat rebar hits - stays functional where standard bits fail at 800 deg. Fahrenheit, protecting your investment in high-heat drilling conditions
• Impact Resistant 4-Cutter Full Carbide Head extracts smaller bites of rebar for controlled, consistent carbide wear and reduced vibration to deliver fast, precise holes - means less operator fatigue and more accurate anchor placements in reinforced concrete
• Tri-Metal Fusion Welding features up to 3X stronger weld to keep the full carbide head intact during extreme impact such as rebar - prevents head separation and catastrophic bit failure during the most punishing hammer drill applications
• Precision Tip delivers stability and accuracy required for fast, precise holes - ensures on-target starts without walking or deflection, critical for anchor setting layouts
• Optimized flute design removes dust faster, keeping the carbide head cooler for ultimate strength and durability - faster dust evacuation translates directly into longer bit life and cleaner, debris-free boreholes
• Wear mark indicator ensures precise hole making - gives drillers a clear visual reference to achieve consistent, code-compliant hole depths without guesswork
• Optimized for maximum performance in corded and cordless SDS-Max rotary hammers - compatible with a wide range of professional-grade tools for flexible jobsite use

Why This Product

• Designed specifically for rebar contact - the 4-cutter full carbide head takes controlled, smaller bites of rebar rather than resisting it outright, resulting in reduced vibration and carbide wear that extends usable bit life far beyond standard options
• Handles extreme heat that destroys ordinary bits - Dura-Carbide withstands up to 1800 deg. Fahrenheit, more than double the 800 deg. Fahrenheit threshold where conventional bits break down, keeping performance consistent throughout long drilling sessions in dense concrete
• Tri-Metal Fusion Welding locks the full carbide head in place under extreme impact - providing up to 3X stronger bond strength compared to standard welding methods, which translates to a bit that stays together when striking embedded rebar
• At a 29" overall length with a 24" working length, this bit reaches deep into concrete substrates for anchor setting applications that shorter bits simply cannot address, all while maintaining the speed and precision required for professional results

Specifications

• Brand: Diablo
• Model Number: DMAMX1230
• Category: SDS-Max 4-Cutter
• Diameter: 1"
• Length: 29"
• Working Length: 24"
• Shank: SDS Max
• Head Type: Full Carbide Head
• Number of Cutters: 4
• Compatible Tools: SDS-Max Rotary Hammer Drill
• Materials: Reinforced Concrete; Concrete; Rebar; Brick/Block
• Pack Quantity: 1
• Country of Origin: Germany

Approved Applications

• Reinforced concrete and concrete

Frequently Asked Questions

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

The Rebar Demon features a 4-cutter full carbide head made with Diablo Dura-Carbide, which provides up to 2X more carbide material compared to standard bits. This allows it to withstand up to 1800 deg. Fahrenheit of heat - more than double the 800 deg. Fahrenheit threshold where standard bits fail - and delivers up to 7X longer life. The 4-cutter geometry also takes smaller, more controlled bites of rebar, reducing vibration and producing more consistent carbide wear over the life of the bit.

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

Tri-Metal Fusion Welding is Diablo's proprietary head attachment process that produces a weld up to 3X stronger than those found on conventional hammer drill bits. This stronger bond keeps the full carbide head intact when the bit strikes rebar or encounters extreme impact forces during high-powered hammer drilling, preventing head breakage and extending the safe working life of the bit.

Is this bit compatible with both corded and cordless rotary hammers?

Yes. The Rebar Demon SDS-Max bit is optimized for maximum performance in both corded and cordless SDS-Max rotary hammer drills, giving professionals flexibility to use it with the tools already on their jobsite.

What is the wear mark indicator and how is it used?

The wear mark indicator is a visual reference built into the bit that ensures precise hole making. It allows the operator to drill to a consistent, accurate depth without relying on estimation, which is particularly important in anchor setting applications where hole depth directly affects holding strength and code compliance.