The Diablo 1-1/4" x 16" x 21" Rebar Demon SDS-Max 4-Cutter Full Carbide Head Hammer Drill Bit is engineered for professionals who need to drill fast, precise holes through reinforced concrete, rebar, brick, and block without sacrificing tool life. Diablo has developed this heavy-duty carbide drill bit as part of a revolutionary lineup that delivers up to 7X longer life compared to standard 2-cutter bits - making it a go-to choice for anchor setting in reinforced concrete and demanding structural drilling applications. With a 1-1/4" diameter, 16" working length, and 21" overall length, this SDS-Max shank bit is built for use with corded and cordless SDS-Max rotary hammer drills where power and precision are both critical.

Key Features

• Up to 7X longer life versus standard 2-cutter hammer drill bits - fewer bit replacements and less downtime on the job site, lowering overall cost per hole.
• Dura-Carbide with up to 2X more carbide - withstands up to 1800 deg. Fahrenheit of intense heat versus standard bits that fail at 800 deg. Fahrenheit, so the bit keeps performing even after repeated rebar contact.
• Impact Resistant 4-Cutter Full Carbide Head - extracts smaller bites of rebar for controlled, consistent carbide wear and reduced vibration, delivering fast and precise holes through the toughest reinforced concrete.
• Tri-Metal Fusion Welding with up to 3X stronger weld - keeps the full carbide head intact during extreme impact such as rebar strikes, preventing catastrophic bit failure in high-stress drilling situations.
• Precision Tip - delivers the stability and accuracy required for fast, precise holes, making it ideal for anchor setting where hole placement matters.
• Optimized flute design - removes dust faster, keeping the carbide head cooler for ultimate strength and durability over the life of the bit.
• Wear mark indicator - ensures precise hole depth making, so anchors are set correctly every time without guesswork.
• Optimized for corded and cordless SDS-Max rotary hammers - delivers maximum performance whether you are running a high-powered corded tool or a modern cordless platform.

Why This Product

• Drilling through rebar is one of the fastest ways to destroy a standard hammer drill bit - the 4-cutter full carbide head is specifically designed to take controlled, smaller bites of rebar, drastically reducing the shock that causes premature carbide loss or bit breakage.
• Heat is the hidden enemy of drill bit longevity. Because Dura-Carbide handles up to 1800 deg. Fahrenheit - more than double the 800 deg. Fahrenheit threshold where standard bits fail - this bit maintains cutting performance even during continuous or high-speed drilling in dense reinforced concrete.
• The optimized flute design actively removes debris and keeps the head cooler during drilling, which means less heat buildup, longer carbide life, and faster hole completion compared to bits with standard flute geometry.
• Produced in Germany and engineered with Tri-Metal Fusion Welding, the full carbide head is built to stay bonded under the extreme impact loads generated by SDS-Max rotary hammers - giving professionals confidence that the bit will not fail mid-hole in critical anchor-setting work.

Specifications

• Brand: Diablo
• Manufacturer Part Number: DMAMX1300
• Category: SDS-Max 4-Cutter
• Diameter: 1-1/4"
• Length: 21"
• Working Length: 16"
• 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 features a 4-cutter full carbide head made with Dura-Carbide that includes up to 2X more carbide than standard bits. This allows it to withstand up to 1800 deg. Fahrenheit of heat versus the 800 deg. Fahrenheit threshold where standard bits typically fail, and it delivers up to 7X longer life. The 4-cutter head also takes smaller, more controlled bites of rebar, reducing vibration and carbide wear compared to standard 2-cutter designs.

What rotary hammer tools is this bit compatible with?

This bit is designed for use with SDS-Max rotary hammer drills, both corded and cordless, and is optimized for maximum performance across those platforms. The SDS-Max shank ensures a secure, positive fit in any SDS-Max chuck.

Can this bit be used for anchor setting in reinforced concrete?

Yes. The Precision Tip on this bit is specifically designed to deliver the stability and accuracy required to produce fast, precise holes in reinforced concrete for anchor setting. The wear mark indicator also helps ensure correct hole depth so anchors are set properly.

How does the flute design contribute to bit performance?

The optimized flute design removes dust and debris faster during drilling, which keeps the carbide head cooler during operation. Keeping the head cooler helps maintain the ultimate strength and durability of the carbide, extending the overall life of the bit especially during sustained drilling in dense or reinforced concrete.