The Diablo Rebar Demon 27/32 in. x 8 in. x 10 in. SDS-Plus 4-Cutter Full Carbide Head Hammer Drill Bit is engineered for professionals who need to drill fast, precise holes through reinforced concrete, standard concrete, brick, block, and rebar without sacrificing bit life. Designed and manufactured in Germany, this Diablo hammer drill bit combines Dura-Carbide technology, Tri-Metal Fusion Welding, and an optimized flute design to outperform standard 2-cutter bits in both speed and durability - making it the go-to choice for anchor setting, structural drilling, and heavy-duty concrete work with corded or cordless SDS-Plus rotary hammers.

Key Features

• Up to 7X longer life versus standard 2-cutter hammer drill bits - dramatically fewer bit changes per job, reducing downtime and overall tooling cost on high-volume concrete drilling applications.
• Dura-Carbide with up to 2X more carbide - withstands up to 1800 deg. Fahrenheit of intense heat generated by rebar contact, whereas standard bits fail at 800 deg. Fahrenheit, keeping performance consistent even in the most punishing conditions.
• 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 chipping or premature head failure.
• Tri-Metal Fusion Welding with up to 3X stronger weld - keeps the full carbide head intact during extreme impact events such as direct rebar strikes, preventing head loss and ensuring continuous drilling performance.
• Precision Tip design - provides the stability and accuracy required for fast, precise hole placement, which is critical for anchor setting in reinforced concrete where hole location tolerance is tight.
• Optimized flute design removes dust faster - keeping the carbide head cooler for ultimate strength and durability, reducing heat buildup that causes premature carbide degradation in conventional bits.
• Wear mark indicator - ensures precise hole depth control for consistent, accurate hole making without the need for separate depth stops.
• Optimized for maximum performance in corded and cordless SDS-Plus rotary hammers - delivers full capability across a wide range of hammer drill platforms so the same bit works seamlessly regardless of power source.

Why This Product

• When drilling through reinforced concrete where rebar strikes are unavoidable, the 4-cutter full carbide head takes small, controlled bites of rebar instead of breaking down under impact - translating directly to fewer bit replacements and faster project completion.
• The ability to withstand up to 1800 deg. Fahrenheit means this bit stays structurally sound in conditions that destroy standard bits, making it the right choice for high-heat drilling environments or extended continuous use.
• Tri-Metal Fusion Welding provides a weld that is up to 3X stronger than conventional methods, giving crews confidence that the carbide head will not separate during aggressive hammer drilling through rebar-dense concrete slabs or walls.
• At 27/32 in. diameter with an 8 in. working length and a 10 in. overall length, this bit is sized for common anchor-setting applications in reinforced concrete, fitting directly into SDS-Plus rotary hammers without adapters or modifications.

Specifications

• Brand: Diablo
• Sub-Brand: Rebar Demon
• Manufacturer Part Number: DMAPL4270
• Category: SDS-Plus 4-Cutter Hammer Drill Bits
• Diameter: 27/32 in.
• Overall Length: 10 in.
• Working Length: 8 in.
• 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, including anchor setting and structural hole making in rebar-dense materials.

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 design. The 4-cutter configuration takes smaller, more controlled bites of rebar, reducing vibration and delivering up to 7X longer bit life. The Dura-Carbide formulation also includes up to 2X more carbide and withstands up to 1800 deg. Fahrenheit of heat, compared to standard bits that fail at 800 deg. Fahrenheit.

Will this bit work in a cordless SDS-Plus rotary hammer, or only in corded tools?

This bit is optimized for maximum performance in both corded and cordless SDS-Plus rotary hammers. As long as your rotary hammer uses an SDS-Plus shank interface, this bit is fully compatible.

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

Tri-Metal Fusion Welding is the manufacturing process Diablo uses to attach the full carbide head to the bit body. It produces a weld that is up to 3X stronger than conventional welding, which is critical when the bit strikes rebar - a high-impact event that can cause standard carbide heads to fracture or separate from the shank under stress.

What is the working length and overall length of this bit, and how do they differ?

This bit has an overall length of 10 in. and a working length of 8 in. The working length refers to the fluted section of the bit that actively removes material and evacuates dust during drilling, while the overall length includes the SDS-Plus shank. The wear mark indicator on the bit helps confirm precise hole depth during anchor-setting operations.