The Diablo 1/2" x 16" x 18" Rebar Demon SDS-Plus 4-Cutter Full Carbide Head Hammer Drill Bit delivers a revolutionary approach to drilling reinforced concrete, combining a full carbide head with Diablo's proprietary Dura-Carbide technology to handle the toughest conditions on the jobsite. Engineered specifically for use with SDS-Plus rotary hammer drills, this bit is built to drill through reinforced concrete, standard concrete, rebar, and brick or block with speed, precision, and dramatically extended service life compared to conventional 2-cutter hammer drill bits. Whether you are setting anchors in rebar-dense slabs or boring through concrete block walls, the Rebar Demon is designed to deliver fast, controlled, precise holes without premature failure.

Key Features

• Up to 7X Longer Life vs. Standard 2-Cutter Hammer Drill Bits - means fewer bit changes, less downtime, and a lower cost-per-hole on demanding reinforced concrete jobs.
• Dura-Carbide with Up to 2X More Carbide Material - withstands up to 1800 deg. Fahrenheit of intense heat, far exceeding the 800 deg. Fahrenheit threshold where standard bits fail, keeping the bit functional through rebar hits and high-heat drilling conditions.
• 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 rebar-reinforced concrete.
• Tri-Metal Fusion Welding with Up to 3X Stronger Weld - keeps the full carbide head intact during extreme impact events such as rebar strikes, significantly reducing the risk of head separation or breakage mid-job.
• Precision Tip Design - delivers the stability and accuracy required to start holes cleanly and maintain positional accuracy for anchor setting in reinforced concrete applications.
• Optimized Flute Design for Faster Dust Removal - clears material from the hole more efficiently, keeping the carbide head cooler during extended drilling for ultimate strength and long-term durability.
• Wear Mark Indicator - allows the operator to confirm precise hole depth at a glance, ensuring accurate hole making without guesswork.
• Optimized for Corded and Cordless SDS-Plus Rotary Hammers - delivers maximum performance whether paired with a high-powered corded hammer or a modern cordless rotary hammer tool.

Why This Product

• If rebar strikes are destroying your standard hammer drill bits prematurely, the Rebar Demon's impact-resistant 4-cutter full carbide head is specifically engineered to absorb those impacts - taking controlled, small bites of rebar rather than shattering on contact, which translates directly into up to 7X longer usable life per bit.
• Heat buildup is the primary failure mode for conventional hammer drill bits, which fail at 800 deg. Fahrenheit. Dura-Carbide withstands up to 1800 deg. Fahrenheit, meaning you can drill faster and longer without the bit losing its cutting edge or structural integrity mid-hole.
• The Tri-Metal Fusion Welding process - with up to 3X stronger weld strength - prevents one of the most dangerous jobsite failures: carbide head separation during high-impact drilling, giving operators added confidence when running high-powered hammer drills through reinforced concrete.
• With a 16" working length and 18" overall length at a 1/2" diameter, this bit is sized for deep anchor bolt holes in thick reinforced concrete slabs and walls, making it a practical choice for structural anchor setting and through-slab applications.

Specifications

• Brand: Diablo
• Sub-Brand: Rebar Demon
• Model Number: DMAPL4200
• Category: SDS-Plus 4-Cutter
• Diameter: 1/2"
• Overall Length: 18"
• Working Length: 16"
• 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 drilling for anchor setting and through-hole applications

Frequently Asked Questions

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

The Rebar Demon uses a 4-cutter full carbide head rather than a standard 2-cutter design. This configuration takes smaller, more controlled bites of rebar on contact, reducing vibration and carbide wear. Combined with Dura-Carbide material that withstands up to 1800 deg. Fahrenheit versus the 800 deg. Fahrenheit failure threshold of standard bits, the result is up to 7X longer bit life in reinforced concrete applications.

Can this bit be used with a cordless SDS-Plus rotary hammer, or does it require a corded tool?

This bit is optimized for maximum performance in both corded and cordless SDS-Plus rotary hammer drills. It is compatible with any SDS-Plus rotary hammer tool, whether corded or cordless.

What is Tri-Metal Fusion Welding, and why does it matter for rebar drilling?

Tri-Metal Fusion Welding is the manufacturing process Diablo uses to bond the full carbide head to the bit body. It provides up to 3X stronger weld strength compared to conventional welding methods, which helps keep the carbide head intact during the extreme impact forces generated when the bit contacts rebar. This significantly reduces the risk of head breakage or separation during heavy-duty drilling.

What is the working length of this bit, and what drilling depths can it reach?

This bit has a working length of 16" and an overall length of 18". The 16" working length is the usable cutting depth, making this bit well suited for deep anchor holes in thick reinforced concrete slabs, walls, and similar structural concrete elements.