The Diablo 3/4" x 24" x 29" 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 or block. Diablo's Rebar Demon series represents a revolutionary approach to SDS-Max hammer drill bit design, combining a full carbide head, advanced carbide formulation, and precision engineering to deliver a bit that outlasts and outperforms standard 2-cutter alternatives in the most demanding jobsite conditions.

Key Features

• Up to 7X longer life versus standard 2-cutter hammer drill bits - dramatically reduces bit replacement frequency and total cost on large-scale concrete drilling projects.
• Dura-Carbide with up to 2X more carbide - withstands up to 1800 deg. Fahrenheit of intense heat, whereas standard bits fail at 800 deg. Fahrenheit, keeping the bit intact when rebar contacts occur that would destroy conventional bits.
• Impact Resistant 4-Cutter Full Carbide Head - takes smaller, controlled bites of rebar for consistent carbide wear and reduced vibration, delivering fast and precise holes even in rebar-heavy reinforced concrete.
• Tri-Metal Fusion Welding with up to 3X stronger weld - keeps the full carbide head securely bonded during extreme impacts such as rebar strikes, preventing head breakage and increasing safety on the job.
• Precision Tip design - provides the stability and accuracy needed for fast, precise hole placement in reinforced concrete, which is critical for accurate anchor setting and structural applications.
• Optimized flute design removes dust faster - keeps the carbide head cooler during drilling, preserving ultimate strength and durability over the life of the bit.
• Wear mark indicator - ensures precise hole depth control so installers can hit their target depth consistently without guesswork.
• Optimized for corded and cordless SDS-Max rotary hammers - delivers maximum performance whether you are running a high-powered corded hammer or a professional-grade cordless rotary hammer.

Why This Product

• For crews regularly drilling into rebar-reinforced concrete, the 4-cutter full carbide head is specifically designed to handle rebar contact without catastrophic bit failure - the same scenario that causes standard 2-cutter bits to break down prematurely.
• The ability to withstand up to 1800 deg. Fahrenheit means this bit stays functional through the intense friction and heat generated by high-powered SDS-Max rotary hammers, reducing costly downtime from bit failure mid-hole.
• With a 24" working length and 29" overall length, this bit reaches deep into thick concrete slabs and masonry walls where shorter bits simply cannot access, making it the right choice for deep anchor holes and through-slab applications.
• The Tri-Metal Fusion Welding process and Dura-Carbide formulation work together to address the two most common failure modes in hammer drill bits - weld breakage under impact and carbide degradation from heat - giving users a reliable tool on reinforced concrete projects where bit failures cause costly delays.

Specifications

• Brand: Diablo
• Manufacturer Part Number: DMAMX1145
• Category: SDS-Max 4-Cutter
• Diameter: 3/4"
• Length: 29"
• Working Length: 24"
• Shank: SDS Max
• Head Type: Full Carbide Head
• 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 this bit different from a standard 2-cutter hammer drill bit?

The Rebar Demon features an Impact Resistant 4-Cutter Full Carbide Head that takes smaller, controlled bites of rebar compared to standard 2-cutter bits. This results in reduced vibration, controlled carbide wear, and up to 7X longer life. The Dura-Carbide formulation also withstands up to 1800 deg. Fahrenheit of heat, more than double the 800 deg. Fahrenheit threshold at which standard bits fail.

Can this bit be used with cordless rotary hammer drills?

Yes. This Rebar Demon SDS-Max bit is optimized for maximum performance in both corded and cordless SDS-Max rotary hammer drills, making it versatile for use across different tool platforms on the jobsite.

What is the difference between the overall length and the working length?

The overall length of this bit is 29", which is the full measurement from shank to tip. The working length - the portion of the bit that actively drills into the material - is 24". This longer working length allows the bit to reach deep into thick concrete slabs and walls for deep anchor setting applications.

What does Tri-Metal Fusion Welding do for the bit's performance?

Tri-Metal Fusion Welding creates a weld that is up to 3X stronger than standard welding methods. This keeps the full carbide head intact during extreme impact situations - such as striking rebar - by resisting both heat and the mechanical shock of hard impacts that would cause a conventionally welded head to separate from the bit body.