The Diablo Rebar Demon 3/16" x 4" x 6" SDS-Plus 4-Cutter Full Carbide Head Hammer Drill Bit is engineered for contractors and tradespeople who need reliable, long-lasting performance when drilling through reinforced concrete, standard concrete, brick, block, and rebar. Designed as part of Diablo's revolutionary Rebar Demon lineup, this SDS-Plus bit delivers fast, precise holes for anchor setting and other demanding applications - even in the presence of rebar that destroys conventional bits. Built and assembled in the United States, it sets a new standard for durability and heat resistance in SDS-Plus rotary hammer drill bits.

Key Features

• Up to 7X longer life versus standard 2-cutter hammer drill bits - fewer bit changes and less downtime on the job site, especially during high-volume anchor setting in reinforced concrete.
• Dura-Carbide with up to 2X more carbide material - withstands up to 1800 deg. Fahrenheit of intense heat, whereas standard bits fail at 800 deg. Fahrenheit, keeping the bit cutting confidently even after rebar contact.
• 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 with less operator fatigue.
• 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 mid-task.
• Precision Tip geometry - delivers the stability and accuracy required for fast, precise holes, reducing the chance of bit walking or off-center starts in hard concrete surfaces.
• Optimized flute design removes dust faster - keeps the carbide head cooler for ultimate strength and durability throughout the full working length of the bit.
• Wear mark indicator - ensures precise hole depth is achieved consistently, critical for reliable anchor setting in structural and reinforced concrete applications.
• Compatible with corded and cordless SDS-Plus rotary hammer drills - gives maximum flexibility for both stationary and mobile work site conditions.

Why This Product

• When drilling into reinforced concrete where hidden rebar is a constant risk, the 4-cutter full carbide head and Tri-Metal Fusion Welding prevent the sudden breakage and tool damage that sideline crews using standard 2-cutter bits.
• The Dura-Carbide formula tolerates heat up to 1800 deg. Fahrenheit - more than twice the threshold of standard bits - so performance stays consistent during extended drilling sessions without stopping to cool down.
• At 3/16" diameter and a 4" working length, this bit covers common anchor and fastener hole sizes in concrete, brick, and block, making it a versatile everyday tool for structural and masonry work.
• Produced in the United States, this bit is backed by Diablo's full engineering of the Rebar Demon platform, offering a purpose-built solution for demanding hammer drilling rather than a general-purpose compromise.

Specifications

• Brand: Diablo
• Model Number: DMAPL4040
• Sub-Brand: Rebar Demon
• Category: SDS-Plus 4-Cutter Hammer Drill Bits
• Diameter: 3/16"
• Length: 6"
• Working Length: 4"
• Shank: SDS-Plus
• Head Type: Full Carbide Head
• Number of Cutters: 4
• Compatible Tools: SDS-Plus Rotary Hammer Drill
• Compatible Materials: Reinforced Concrete; Concrete; Rebar; Brick/Block
• Pack Quantity: 1
• Country of Origin: United States

Approved Applications

• Reinforced concrete and concrete drilling for anchor setting and fastener placement

Frequently Asked Questions

What makes the Rebar Demon bit different from a standard 2-cutter SDS-Plus hammer drill bit?

The Rebar Demon features a 4-cutter full carbide head rather than a standard 2-cutter design. This configuration takes smaller bites of rebar for controlled, consistent carbide wear, reduced vibration, and up to 7X longer life. It also uses Dura-Carbide material that withstands up to 1800 deg. Fahrenheit of heat - compared to standard bits that fail at 800 deg. Fahrenheit - and Tri-Metal Fusion Welding that provides up to 3X stronger weld strength to resist breakage on rebar impact.

What rotary hammer drills is this bit compatible with?

This bit is designed for use with SDS-Plus rotary hammer drills and is optimized for maximum performance in both corded and cordless SDS-Plus models.

What materials can this bit drill through?

This bit is rated for use in reinforced concrete, concrete, rebar, brick, and block - making it suitable for a broad range of structural masonry and anchor-setting tasks.

What is the wear mark indicator and why does it matter?

The wear mark indicator is a built-in reference point on the bit that ensures precise hole depth during drilling. For anchor setting applications in concrete and reinforced concrete, hitting the correct depth is critical for structural integrity, and this feature removes the guesswork from the process.