The Diablo 1-1/4" x 31" x 36" Rebar Demon SDS-Max 4-Cutter Full Carbide Head Hammer Drill Bit delivers a revolutionary approach to drilling through reinforced concrete, rebar, brick, and block. Engineered by Diablo with Dura-Carbide technology and Tri-Metal Fusion Welding, this heavy-duty SDS-Max bit is purpose-built for professionals who demand maximum durability, faster drilling speeds, and cooler operation in the most punishing jobsite conditions. Whether you are setting anchors in reinforced slabs or boring large-diameter holes through tough masonry, this 36" overall-length bit with a 31" working length gives you the reach and performance to get the job done right.

Key Features

• Up to 7X longer life versus standard 2-cutter hammer drill bits - fewer bit changes mean more uptime and lower cost per hole on demanding reinforced concrete jobs
• Dura-Carbide formulation features up to 2X more carbide that withstands up to 1800 deg. Fahrenheit of intense heat - far exceeding standard bits that fail at 800 deg. Fahrenheit, so the bit stays hard and cutting even during rebar encounters
• Impact Resistant 4-Cutter Full Carbide Head extracts smaller bites of rebar for controlled, consistent carbide wear and reduced vibration - delivering fast, precise holes without the shock that destroys standard bits
• Tri-Metal Fusion Welding features up to 3X stronger weld to keep the full carbide head intact during extreme impact such as rebar - protecting your investment and preventing dangerous head separation
• Precision Tip delivers stability and accuracy required for fast, precise holes - essential for accurate anchor setting in reinforced concrete where placement tolerances are tight
• Optimized flute design removes dust faster, keeping the carbide head cooler for ultimate strength and durability - reducing heat buildup that shortens bit life
• Wear mark indicator ensures precise hole making - so you always know when you have reached the correct embedment depth without measuring
• Optimized for maximum performance in corded and cordless SDS-Max rotary hammers - giving you consistent results regardless of your power source

Why This Product

• Rebar is the number one cause of bit failure on reinforced concrete jobs - the 4-cutter full carbide head is specifically designed to absorb rebar impacts through controlled, incremental cuts rather than the shock loading that shatters standard 2-cutter heads
• Heat resistance up to 1800 deg. Fahrenheit means the carbide head maintains its cutting edge even in continuous high-production drilling situations where ordinary bits soften and fail at 800 deg. Fahrenheit
• The 36" overall length with a 31" working length is ideal for deep anchor holes in thick reinforced concrete walls or slabs where shorter bits simply cannot reach
• Tri-Metal Fusion Welding keeps the full carbide head bonded under extreme stress - giving crews confidence that the bit will not fail catastrophically mid-hole in critical structural applications

Specifications

• Brand: Diablo
• Manufacturer Part Number: DMAMX1320
• Diameter: 1-1/4"
• Length: 36"
• Working Length: 31"
• 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 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. This allows the bit to take smaller, controlled bites of rebar instead of sustaining full direct impact on fewer cutting edges. Combined with Dura-Carbide that withstands up to 1800 deg. Fahrenheit versus the 800 deg. Fahrenheit limit of standard bits, the result is up to 7X longer life, reduced vibration, and consistent performance even when drilling through rebar-dense concrete.

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 hammer drills, so you can use it with your existing cordless platform without sacrificing drilling speed or bit life.

What does the wear mark indicator do?

The wear mark indicator is a visual reference built into the bit that lets you confirm you have reached the correct hole depth while drilling. This is particularly valuable when setting anchors in reinforced concrete, where precise embedment depth is critical to the integrity of the fastened connection.

Why does the optimized flute design matter for bit performance?

The flute geometry on the Rebar Demon is engineered to evacuate drilling dust and debris from the hole faster than a conventional flute design. Faster dust removal keeps the carbide head cooler during operation, which directly preserves the hardness and cutting ability of the carbide - contributing to the bit's extended service life in reinforced concrete and masonry applications.