The Diablo 1" x 31" x 36" Rebar Demon SDS-Max 4-Cutter Full Carbide Head Hammer Drill Bit is engineered for professionals who need maximum durability and speed when drilling through reinforced concrete, concrete, rebar, and brick/block. Diablo designed this heavy-duty rotary hammer bit from the ground up to outlast, outperform, and run cooler than standard 2-cutter hammer drill bits - delivering precise anchor-setting holes in the most demanding jobsite conditions.

Key Features

• Up to 7X longer life versus standard 2-cutter hammer drill bits - significantly reduces bit replacement frequency and downtime on the job
• Dura-Carbide head features up to 2X more carbide material that withstands up to 1800 deg. Fahrenheit of intense heat - far exceeds the 800 deg. Fahrenheit threshold where standard bits fail, keeping the cutting edge intact during rebar strikes
• Impact Resistant 4-Cutter Full Carbide Head extracts smaller bites of rebar for controlled, consistent carbide wear and reduced vibration - delivers fast, precise holes with less operator fatigue
• 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
• Precision Tip delivers stability and accuracy required for fast, precise holes - critical for reliable anchor setting in reinforced concrete structures
• Optimized flute design removes dust faster, keeping the carbide head cooler for ultimate strength and durability - reduced heat buildup means the bit maintains its cutting performance longer
• Wear mark indicator ensures precise hole making - takes the guesswork out of drilling to correct depth for anchor installation
• Optimized for maximum performance in corded and cordless SDS-Max rotary hammers - versatile compatibility across a wide range of professional hammer drill tools

Why This Product

• When drilling through reinforced concrete where unexpected rebar contact can destroy a standard bit, the 4-cutter full carbide head and Tri-Metal Fusion Welding absorb extreme impact without head breakage - keeping crews productive instead of stopping to swap out failed bits
• The 31" working length on a 36" overall bit gives reach deep into thick concrete slabs or walls while the SDS-Max shank delivers the torque transfer needed for large-diameter holes in the toughest masonry materials
• At 1" diameter, this bit handles the large anchor holes commonly required in heavy structural and commercial concrete applications - paired with the Precision Tip for the accuracy anchor setting demands
• Dura-Carbide's ability to withstand up to 1800 deg. Fahrenheit - more than double the heat tolerance of standard bits - means the cutting edge stays sharp and effective even during prolonged drilling sessions through hard aggregate concrete

Specifications

• Brand: Diablo
• Model Number: DMAMX1240
• Category: SDS-Max 4-Cutter
• Diameter: 1"
• Length: 36"
• Working Length: 31"
• Shank: SDS Max
• Head Type: Full Carbide Head
• Number of Cutters: 4
• 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

Frequently Asked Questions

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

The Rebar Demon uses a 4-cutter full carbide head instead of a standard 2-cutter design. This means the bit takes smaller, controlled bites when it contacts rebar rather than sustaining a single high-impact hit, which reduces vibration and carbide wear. Combined with Dura-Carbide that tolerates up to 1800 deg. Fahrenheit - versus 800 deg. Fahrenheit for standard bits - the result is up to 7X longer service life than conventional hammer drill bits.

What shank type does this bit require, and will it work with my rotary hammer?

This bit uses an SDS-Max shank and is optimized for maximum performance in both corded and cordless SDS-Max rotary hammer drills. It is not compatible with SDS-Plus rotary hammers, which use a smaller shank format. Verify that your tool accepts the SDS-Max shank before use.

What does the wear mark indicator do?

The wear mark indicator is a visual reference built into the bit that helps the operator drill to a precise, consistent depth. This is especially useful when setting anchors in reinforced concrete, where drilling too shallow or too deep can affect anchor performance and structural integrity.

Can this bit drill through rebar, or does it need to avoid it?

This bit is specifically designed to handle rebar contact. The impact resistant 4-cutter full carbide head extracts smaller bites of rebar for controlled, consistent carbide wear, and the Tri-Metal Fusion Welding keeps the full carbide head intact during extreme impact such as rebar hits. While the bit is engineered to survive and continue cutting through rebar, its primary application is reinforced concrete and concrete drilling for anchor setting.