The Diablo 1-1/8 in. x 24 in. x 29 in. Rebar Demon SDS-Max 4-Cutter Full Carbide Head Hammer Drill Bit is an engineered solution for professionals who drill through reinforced concrete, concrete, brick, and block on a daily basis. Diablo designed this SDS-Max rotary hammer bit to outlast standard 2-cutter bits by up to 7 times while staying cooler, cutting faster, and surviving direct rebar strikes that would destroy conventional hammer drill bits. Whether you are setting anchors in heavily reinforced slabs or boring through block walls, this bit delivers the precision, durability, and controlled performance that demanding concrete drilling requires.

Key Features

• Up to 7X longer life versus standard 2-cutter hammer drill bits - dramatically reduces bit replacement frequency and lowers overall cost per hole on reinforced concrete jobsites.
• Diablo Dura-Carbide with up to 2X more carbide - withstands up to 1800 deg. Fahrenheit of intense heat to combat rebar hits, compared to standard bits that fail at 800 deg. Fahrenheit, keeping the cutting head intact under extreme thermal stress.
• Impact Resistant 4-Cutter Full Carbide Head - extracts smaller bites of rebar for controlled, consistent carbide wear and reduced vibration, so you get fast, precise holes even when hitting embedded rebar.
• 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 separation and extending service life.
• Precision Tip geometry - delivers the stability and accuracy required for fast, precise holes, reducing wander on initial contact with concrete and reinforced surfaces.
• Optimized flute design removes dust faster - keeps the carbide head cooler for ultimate strength and durability, improving hole quality and reducing wear during continuous drilling.
• Wear mark indicator - ensures precise hole making by giving the operator a clear visual reference for correct drilling depth without the need for additional stop collars.
• Optimized for corded and cordless SDS-Max rotary hammers - delivers maximum performance across a wide range of high-powered tools, making this bit versatile for both heavy-duty corded rigs and modern cordless platforms.

Why This Product

• Rebar is one of the most destructive forces on a hammer drill bit - the 4-Cutter Full Carbide Head and Tri-Metal Fusion Welding are specifically engineered to absorb rebar impact in a controlled way, preventing the sudden carbide breakage that sidelines crews using standard bits.
• The Dura-Carbide formulation survives temperatures up to 1800 deg. Fahrenheit, more than double the 800 deg. Fahrenheit threshold where standard bits fail - this matters most during sustained high-production drilling where heat buildup is unavoidable.
• At 29 in. overall length with a 24 in. working length and a 1-1/8 in. diameter, this bit is sized for deep anchor-setting applications in thick reinforced concrete where shorter or narrower bits simply cannot reach or meet hole specifications.
• Made in Germany and part of Diablo's most complete range of SDS-Max Rebar Demon bits, this bit pairs controlled carbide wear with an optimized flute design to remove debris quickly - keeping the hole clean and the bit cool for consistent hole quality from the first hole to the last.

Specifications

• Brand: Diablo
• Model Number: DMAMX1270
• Diameter: 1-1/8 in.
• Length: 29 in.
• Working Length: 24 in.
• Shank: SDS-Max
• Head Type: Full Carbide Head
• Number of Cutters: 4
• Category: SDS-Max 4-Cutter
• 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 through-hole applications

Frequently Asked Questions

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

The Rebar Demon features a 4-Cutter Full Carbide Head made with Dura-Carbide that contains up to 2X more carbide than standard bits. This allows it to withstand up to 1800 deg. Fahrenheit of heat - more than double the 800 deg. Fahrenheit limit where standard bits fail. The result is up to 7X longer life, reduced vibration, and controlled wear even when drilling through embedded rebar.

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

Tri-Metal Fusion Welding is Diablo's proprietary process for bonding the full carbide head to the bit body. It produces a weld that is up to 3X stronger than conventional welds, which keeps the carbide head intact when the bit strikes rebar or other hard inclusions inside concrete. This prevents the sudden head loss that can damage hammer drills and halt work.

Is this bit compatible with cordless SDS-Max rotary hammers?

Yes. The Rebar Demon SDS-Max 4-Cutter bit is optimized for maximum performance in both corded and cordless SDS-Max rotary hammers. The optimized flute design removes dust faster to keep the carbide head cooler, which is especially beneficial when using cordless tools where drilling cycles may be longer between breaks.

What does the wear mark indicator do?

The wear mark indicator is a visual reference built into the bit that allows the operator to confirm correct drilling depth and monitor carbide wear during use. This helps ensure precise hole making for anchor setting applications without the need for a separate depth stop, saving time and improving consistency across multiple holes.