The Diablo 2" x 16" x 21" Rebar Demon SDS-Max 4-Cutter Carbide-Tipped Hammer Drill Bit is engineered for professionals who demand maximum performance when drilling through reinforced concrete, concrete, brick, and block. Built by Diablo with a full-carbide 4-cutter head and Tri-Metal Fusion Welding, this SDS-Max bit delivers fast, precise holes in the most demanding conditions - including direct rebar strikes - while lasting up to 7X longer than standard 2-cutter bits. With a 2" diameter, 21" overall length, and 16" working length, it is optimized for deep anchor-setting applications in heavily reinforced slabs and walls.

Key Features

• Up to 7X longer life versus standard 2-cutter hammer drill bits - dramatically reduces bit replacement frequency and downtime on heavy drilling jobs in reinforced concrete.
• Diablo Dura-Carbide with up to 2X more carbide - withstands up to 1800 deg. Fahrenheit of intense heat generated by rebar contact, compared to standard bits that fail at 800 deg. Fahrenheit, keeping the bit cutting longer under extreme stress.
• 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 even through rebar-laden concrete.
• Tri-Metal Fusion Welding with up to 3X stronger weld - keeps the full carbide head intact during extreme impacts such as rebar strikes, preventing sudden breakage and improving operator safety.
• Precision Tip design - delivers the stability and accuracy required for fast, precise holes in reinforced concrete anchor-setting applications, reducing bit walk and improving placement accuracy.
• Optimized flute design - removes dust faster and keeps the carbide head cooler for ultimate strength and durability over extended drilling sessions.
• Wear mark indicator - ensures precise hole depth control so anchor installations meet required specifications every time.
• Optimized for corded and cordless SDS-Max rotary hammers - compatible with a wide range of professional-grade hammer drills, making this bit a versatile addition to any drilling toolkit.

Why This Product

• When drilling through reinforced concrete where rebar contact is unavoidable, standard 2-cutter bits fail prematurely - the Rebar Demon's 4-cutter full-carbide head and Dura-Carbide construction are specifically designed to absorb rebar impacts and continue cutting, reducing costly interruptions.
• The combination of Tri-Metal Fusion Welding and heat resistance up to 1800 deg. Fahrenheit means the carbide head stays bonded and functional under the stress that would cause conventional bits to crack or debond, making this a reliable choice for large-scale concrete anchor projects.
• At 2" diameter and 16" working length, this bit is sized for deep-hole applications in thick reinforced slabs - anchor bolt installations, structural post bases, and heavy mechanical penetrations - where both reach and precision matter.
• The optimized flute geometry actively clears debris and cools the cutting head during use, meaning less overheating, longer bit life, and more consistent hole quality throughout a full day of drilling on the job site.

Specifications

• Brand: Diablo
• Model Number: DMAMX1400
• Category: SDS-Max 4-Cutter
• Diameter: 2"
• Overall Length: 21"
• Working Length: 16"
• Shank: SDS Max
• Head Type: Carbide-Tipped
• 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 different from a standard SDS-Max hammer drill bit?

Standard 2-cutter bits typically use less carbide and fail when exposed to heat above 800 deg. Fahrenheit or direct rebar contact. The Rebar Demon uses a 4-cutter full-carbide head with Dura-Carbide that resists heat up to 1800 deg. Fahrenheit, Tri-Metal Fusion Welding for up to 3X stronger head bonding, and an optimized flute design for faster dust removal - resulting in up to 7X longer service life in reinforced concrete drilling applications.

What rotary hammer tools are compatible with this bit?

This bit features an SDS-Max shank and is optimized for use with corded and cordless SDS-Max rotary hammer drills. It is not compatible with SDS-Plus rotary hammers, which use a smaller shank format.

What is the working length and why does it matter for anchor setting?

The working length of this bit is 16", which represents the usable drilling depth available for cutting through material. For anchor-setting applications in reinforced concrete - such as structural bolts or post bases - sufficient working length ensures the bit can reach the required embedment depth even when drilling through thick slabs or walls.

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

The Rebar Demon is specifically designed to handle rebar contact. The impact-resistant 4-cutter full-carbide head takes small, controlled bites of rebar rather than trying to avoid it, which delivers consistent carbide wear, reduced vibration, and maintains drilling accuracy. The Tri-Metal Fusion Welding keeps the carbide head intact during these extreme impact events.