The Diablo 1/2" x 8" x 13" Rebar Demon SDS-Max 4-Cutter Full Carbide Head Hammer Drill Bit is an engineered solution for professionals who need to drill fast, precise holes through reinforced concrete, standard concrete, brick, block, and rebar without sacrificing bit longevity. Diablo developed this SDS-Max hammer drill bit with a full-carbide head and optimized flute geometry to outperform conventional 2-cutter bits in high-demand anchor-setting and concrete drilling applications, delivering superior heat resistance, controlled carbide wear, and measurably longer service life in corded and cordless SDS-Max rotary hammers alike.

Key Features

• Up to 7X longer life versus standard 2-cutter hammer drill bits - fewer bit changes during heavy reinforced concrete work, reducing downtime and replacement costs on the job.
• Diablo Dura-Carbide with up to 2X more carbide material - withstands up to 1800 deg. Fahrenheit of intense heat from rebar hits, compared to standard bits that fail at 800 deg. Fahrenheit, keeping the bit functional in extreme conditions.
• Impact Resistant 4-Cutter Full Carbide Head - extracts smaller bites of rebar for controlled, consistent carbide wear and reduced vibration, producing fast, precise holes even through steel-reinforced slabs.
• Tri-Metal Fusion Welding with up to 3X stronger weld - keeps the full carbide head intact during extreme impact events such as rebar strikes, preventing head separation and maintaining drilling accuracy.
• Precision Tip geometry - delivers the stability and accuracy required for fast, precise holes, making it especially reliable for anchor-setting applications where hole placement is critical.
• Optimized flute design - removes dust faster, keeping the carbide head cooler for ultimate strength and durability during extended drilling sessions.
• Wear mark indicator - provides a visual reference that ensures precise hole depth, eliminating guesswork during anchor installation.
• Compatible with corded and cordless SDS-Max rotary hammers - gives crews flexibility to use the bit with the power source available on site without sacrificing performance.

Why This Product

• When drilling into reinforced concrete where hidden rebar is a constant hazard, the 4-cutter full carbide head absorbs rebar impact without catastrophic bit failure - a direct result of the Tri-Metal Fusion Welding and Dura-Carbide construction that distinguishes this bit from standard 2-cutter alternatives.
• The combination of 1800 deg. Fahrenheit heat resistance and an optimized dust-evacuation flute means the carbide head stays cooler and harder longer, translating to sustained cutting speed and consistency across an entire work session rather than just the first few holes.
• At a 1/2" diameter with an 8" working length and 13" overall length, this bit is sized for anchor-setting in thick concrete structures where both reach and hole precision matter - and the wear mark indicator reinforces that precision at the point of use.
• Sourced from Germany with Diablo's proprietary Dura-Carbide formulation, this bit is built for the stress of high-powered SDS-Max rotary hammers - giving contractors and tradespeople confidence that the tool will hold up through demanding production drilling without early carbide loss or weld failure.

Specifications

• Brand: Diablo
• Model Number: DMAMX1020
• Category: SDS-Max 4-Cutter
• Diameter: 1/2"
• Overall Length: 13"
• Working Length: 8"
• 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 drilling for anchor setting and through-hole work

Frequently Asked Questions

What makes the Rebar Demon bit more durable than a standard hammer drill bit?

The Rebar Demon uses Diablo's Dura-Carbide formulation, which features up to 2X more carbide material than standard bits. This allows it to withstand up to 1800 deg. Fahrenheit of heat generated by rebar impact, while standard bits typically fail at 800 deg. Fahrenheit. In addition, Tri-Metal Fusion Welding provides up to 3X stronger weld strength to keep the full carbide head intact during extreme impacts, and the 4-cutter design delivers controlled, consistent carbide wear rather than sudden failure - resulting in up to 7X longer bit life.

What shank type is required, and which rotary hammers are compatible?

This bit uses an SDS Max shank and is optimized for maximum performance in both corded and cordless SDS-Max rotary hammer drills. Make sure your rotary hammer accepts the SDS-Max shank format before use - this bit is not compatible with SDS-Plus chucks.

What is the working length versus the overall length, and why does it matter?

The overall length of this bit is 13", while the working length - the portion that actively drills - is 8". The working length determines the maximum hole depth the bit can achieve in a single pass. For anchor-setting applications, knowing the working length ensures the hole reaches the required embedment depth without repositioning the drill.

Can this bit drill through rebar, or should drilling be stopped when rebar is encountered?

Yes - the Rebar Demon is specifically engineered to drill through rebar. The 4-cutter full carbide head is impact resistant and takes small, controlled bites of rebar rather than attempting to cut through it in large passes. This controlled engagement reduces vibration and prevents abrupt carbide loss, allowing drilling to continue through steel-reinforced concrete without stopping to reposition or replace the bit.