The Diablo Rebar Demon 1-1/8 in. x 16 in. x 18 in. SDS-Plus 4-Cutter Full Carbide Head Hammer Drill Bit (DMAPL4320) is engineered for professionals who drill into reinforced concrete, concrete, brick, and block on a daily basis. Designed by Diablo to deliver the most durable, fastest, and coolest performance available in SDS-Plus hammer drill bits, this Rebar Demon bit meets the demands of high-powered rotary hammers in the toughest jobsite conditions - from anchor setting in reinforced slabs to precision drilling through rebar-embedded concrete.

Key Features

• Up to 7X longer life versus standard 2-cutter hammer drill bits - dramatically reduces bit replacement frequency and overall drilling cost per hole
• Diablo Dura-Carbide with up to 2X more carbide withstands up to 1800 deg. Fahrenheit of intense heat, compared to standard bits that fail at 800 deg. Fahrenheit - keeps the bit performing through rebar hits that would destroy conventional drill bits
• Impact Resistant 4-Cutter Full Carbide Head takes smaller bites of rebar for controlled, consistent carbide wear and reduced vibration - delivers fast, precise holes with less operator fatigue
• Tri-Metal Fusion Welding features up to 3X stronger weld to keep the full carbide head intact during extreme impact such as rebar - prevents costly head separation and maintains drilling accuracy
• Precision Tip delivers the stability and accuracy required for fast, precise holes - ideal for anchor setting applications where hole placement is critical
• Optimized flute design removes dust faster, keeping the carbide head cooler for ultimate strength and durability - reduces heat buildup that degrades bit life in extended drilling sessions
• Wear mark indicator ensures precise hole making - takes the guesswork out of achieving correct embedment depths for anchors and fasteners
• Optimized for maximum performance in corded and cordless SDS-Plus or SDS-Max rotary hammers - versatile compatibility across a wide range of professional rotary hammer tools

Why This Product

• Drilling through rebar no longer means immediate bit failure - the 4-cutter full carbide head is specifically designed to absorb rebar impacts with controlled carbide wear, making this bit the right choice for reinforced concrete applications where rebar contact is unavoidable
• The combination of Dura-Carbide heat resistance up to 1800 deg. Fahrenheit and an optimized dust-clearing flute design means the bit stays cooler and stronger through long production drilling runs, reducing downtime and bit changes on demanding jobsites
• A 16 in. working length in an 18 in. overall bit provides the deep-reach capability needed for through-slab drilling and deep anchor holes, while the 1-1/8 in. diameter suits large-diameter anchor installations in concrete structures
• Manufactured in Germany to Diablo's full-carbide head standards, this bit delivers the consistent quality and tight tolerances that professionals require for precise hole placement in structural concrete and masonry

Specifications

• Brand: Diablo
• Model Number: DMAPL4320
• Sub-Brand: Rebar Demon
• Category: SDS-Plus 4-Cutter
• Diameter: 1-1/8 in.
• Length: 18 in.
• Working Length: 16 in.
• 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: Germany

Approved Applications

• Reinforced concrete and concrete

Frequently Asked Questions

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

The Rebar Demon features a 4-cutter full carbide head made with Diablo Dura-Carbide, which provides up to 2X more carbide than standard bits. This allows it to withstand heat up to 1800 deg. Fahrenheit, compared to standard bits that fail at 800 deg. Fahrenheit. The result is up to 7X longer life and significantly more consistent performance when drilling through rebar-embedded concrete.

Can this bit be used in cordless rotary hammers, or is it only for corded tools?

This bit is optimized for maximum performance in both corded and cordless SDS-Plus or SDS-Max rotary hammers, making it suitable for a wide range of professional rotary hammer tools on and off the jobsite.

What is the purpose of the wear mark indicator on this bit?

The wear mark indicator is a built-in reference point that ensures precise hole depth during drilling. It takes the guesswork out of achieving the correct embedment depth, which is especially important for anchor setting applications in reinforced concrete where precise hole depth is required for rated load performance.

What is Tri-Metal Fusion Welding and why does it matter?

Tri-Metal Fusion Welding is Diablo's proprietary process used to bond the full carbide head to the bit body. It produces a weld that is up to 3X stronger than standard welding methods, which helps keep the carbide head intact during extreme impact situations - such as direct rebar contact - preventing head separation and maintaining drilling accuracy throughout the life of the bit.