The Diablo Rebar Demon 1/4" x 6" x 8" SDS-Plus 4-Cutter Full Carbide Head Hammer Drill Bit is engineered for professionals who demand exceptional durability and speed when drilling into reinforced concrete. Designed by Diablo to be the most durable, fastest, and coolest hammer drill bit solution available, the Rebar Demon line brings a full-carbide head construction and advanced welding technology to heavy-duty anchor setting and concrete drilling tasks where standard bits fall short. Whether you are working through concrete slabs, brick and block masonry, or rebar-reinforced structures, this SDS-Plus bit delivers the performance and precision required to get the job done right.

Key Features

• Up to 7X longer life versus standard 2-cutter hammer drill bits - dramatically reduces bit replacement frequency and lowers cost per hole on demanding jobsites.
• Dura-Carbide with up to 2X more carbide - withstands up to 1800 deg. Fahrenheit of intense heat, keeping the bit cutting strong where standard bits fail at 800 deg. Fahrenheit when hitting rebar.
• 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 reinforced concrete.
• Tri-Metal Fusion Welding with up to 3X stronger weld - keeps the full carbide head intact during extreme impact such as rebar strikes, preventing breakage and maintaining safety on the job.
• Precision Tip - delivers the stability and accuracy required for fast, precise holes in reinforced concrete, critical for accurate anchor setting.
• Optimized flute design - removes dust faster and keeps the carbide head cooler for ultimate strength and durability during extended drilling operations.
• Wear mark indicator - ensures precise hole making so you always know exactly how deep you are drilling without guesswork.
• Optimized for corded and cordless SDS-Plus rotary hammers - provides maximum performance whether you are using a corded or battery-powered hammer drill on the jobsite.

Why This Product

• For crews drilling into reinforced concrete, hitting rebar is unavoidable - the Rebar Demon's 4-cutter full carbide head is specifically designed to handle rebar impacts with controlled wear, so the bit keeps cutting rather than failing prematurely.
• Standard hammer drill bits break down at 800 deg. Fahrenheit, but the Dura-Carbide formula used here withstands up to 1800 deg. Fahrenheit, meaning this bit maintains its cutting edge during the intense heat generated by high-powered rotary hammer use.
• The Tri-Metal Fusion Welding process produces a weld up to 3X stronger than conventional methods, so the carbide head stays bonded to the bit body even under repeated high-impact drilling - reducing the risk of sudden bit failure.
• With a 1/4" diameter and 6" working length in an 8" overall package, this bit is well suited for anchor bolt and fastener hole placement in concrete walls, floors, and structural members where accurate depth control matters.

Specifications

• Brand: Diablo
• Sub-Brand: Rebar Demon
• Category: SDS-Plus 4-Cutter
• Diameter: 1/4"
• Length: 8"
• Working Length: 6"
• 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

Available Pack Options

• DMAPL4080: 1 Ea
• DMAPL4080-P25: 25 Pk

Approved Applications

• Drilling into reinforced concrete and concrete for anchor setting and fastener placement
• Penetrating rebar-embedded concrete slabs, walls, and structural members
• Boring holes in brick and block masonry

Frequently Asked Questions

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

The Rebar Demon uses an impact resistant 4-cutter full carbide head instead of the standard 2-cutter design. This 4-cutter configuration takes smaller bites of rebar, resulting in controlled and consistent carbide wear, reduced vibration, and up to 7X longer bit life compared to standard 2-cutter hammer drill bits.

Why does the heat resistance of this bit matter when drilling into reinforced concrete?

When a drill bit contacts rebar inside concrete, it generates intense heat that can cause standard carbide bits to fail at around 800 deg. Fahrenheit. The Diablo Dura-Carbide formula used in the Rebar Demon features up to 2X more carbide and is engineered to withstand temperatures up to 1800 deg. Fahrenheit, allowing the bit to maintain its cutting performance through rebar contact that would destroy a conventional bit.

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

Tri-Metal Fusion Welding is the manufacturing process Diablo uses to bond the full carbide head to the bit body. It produces a weld that is up to 3X stronger than standard welding methods. This significantly reduces the risk of the carbide head separating from the shank during extreme impact events such as repeated rebar strikes, making the bit safer and more reliable in demanding applications.

Is this bit compatible with both corded and cordless rotary hammers?

Yes. The Rebar Demon SDS-Plus bit is optimized for maximum performance in both corded and cordless SDS-Plus rotary hammer drills, giving you consistent drilling results regardless of whether your tool is plug-in or battery-powered.