The Diablo 1-3/8" x 16" x 21" Rebar Demon SDS-Max 4-Cutter Carbide-Tipped Hammer Drill Bit is engineered for professionals who demand maximum durability, speed, and precision when drilling through reinforced concrete. Designed for use with SDS-Max rotary hammer drills, this bit delivers fast, accurate holes in rebar-embedded concrete, standard concrete, brick, and block - applications where ordinary bits fail early or break under stress. Diablo's Rebar Demon series represents a revolutionary approach to carbide drill bit technology, combining advanced materials science with purpose-built geometry to outlast and outperform standard 2-cutter alternatives in the most punishing job site conditions.

Key Features

• Up to 7X longer life versus standard 2-cutter hammer drill bits - dramatically reduces bit changeouts and downtime on reinforced concrete drilling jobs.
• Dura-Carbide with up to 2X more carbide - withstands up to 1800 deg. Fahrenheit of intense heat, keeping the bit functional through rebar strikes where standard bits fail at just 800 deg. Fahrenheit.
• Impact Resistant 4-Cutter Full Carbide Head - takes smaller bites of rebar for controlled, consistent carbide wear and reduced vibration, resulting in fast, precise holes even through tough reinforced concrete.
• Tri-Metal Fusion Welding with up to 3X stronger weld - keeps the full carbide head securely intact during extreme rebar impacts, preventing breakage and ensuring reliable performance throughout the bit's life.
• Precision Tip geometry - delivers the stability and accuracy required for fast, precise hole placement in reinforced concrete, critical for anchor setting applications where location matters.
• Optimized flute design removes dust faster - keeps the carbide head cooler during drilling for ultimate strength, durability, and sustained cutting performance.
• Wear mark indicator - ensures precise hole making by giving the operator a clear visual reference for consistent drilling depth.
• Optimized for corded and cordless SDS-Max rotary hammers - compatible with the full range of professional rotary hammer tools, maximizing versatility on the job site.

Why This Product

• When drilling through rebar-embedded concrete, standard bits overheat and fail at 800 deg. Fahrenheit - the Rebar Demon's Dura-Carbide head withstands up to 1800 deg. Fahrenheit, making it the right choice for any project where rebar contact is unavoidable.
• The 4-cutter full carbide head paired with Tri-Metal Fusion Welding addresses the two most common failure modes of hammer drill bits - carbide wear and head breakage - delivering up to 7X longer service life compared to standard 2-cutter designs.
• At 21" total length with a 16" working length and 1-3/8" diameter, this bit is sized for deep-hole drilling in thick reinforced concrete slabs and walls, providing the reach needed for structural anchor setting work.
• The optimized flute design actively removes debris during drilling, reducing heat buildup and keeping hole quality consistent - a direct benefit when precision placement in reinforced concrete is required.

Specifications

• Brand: Diablo
• MPN: DMAMX1330
• Category: SDS-Max 4-Cutter
• Diameter: 1-3/8"
• 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 drilling

Frequently Asked Questions

What makes this bit different from a standard 2-cutter hammer drill bit?

The Rebar Demon features a 4-cutter full carbide head with Diablo's Dura-Carbide formulation, which provides up to 2X more carbide material and withstands up to 1800 deg. Fahrenheit of heat - more than double the 800 deg. Fahrenheit threshold where standard bits fail. Combined with Tri-Metal Fusion Welding and an optimized flute design, the result is up to 7X longer bit life compared to standard 2-cutter alternatives.

Can this bit be used with cordless SDS-Max rotary hammer drills?

Yes. This Rebar Demon bit is optimized for maximum performance in both corded and cordless SDS-Max rotary hammer drills, making it versatile for job sites where corded power may not always be available.

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

The total length of this bit is 21", which includes the SDS-Max shank that inserts into the drill. The working length - the portion of the bit that actively drills into the material - is 16". This distinction is important when determining maximum achievable hole depth for your specific application.

Is this bit appropriate for anchor setting in reinforced concrete?

Yes. The Precision Tip geometry is specifically designed to deliver the stability and accuracy required to produce fast, precise holes in reinforced concrete for anchor setting. The 4-cutter carbide head manages rebar contact by taking smaller bites of rebar, reducing vibration and maintaining hole accuracy even when rebar is encountered mid-drill.