The Diablo Rebar Demon 1/4 in. x 10 in. x 12 in. SDS-Plus 4-Cutter Full Carbide Head Hammer Drill Bit is engineered for professionals who demand speed, durability, and precision when drilling through reinforced concrete, concrete, brick, and block. Built around Diablo's Dura-Carbide technology and an impact-resistant 4-cutter full carbide head, this hammer drill bit is designed to outlast standard 2-cutter bits by up to 7X - making it the right tool for anchor setting and other demanding applications in reinforced concrete where standard bits break down under heat and rebar impact.

Key Features

• Up to 7X longer life versus standard 2-cutter hammer drill bits - fewer bit changes on the job means less downtime and lower cost per hole drilled
• Dura-Carbide with up to 2X more carbide - withstands up to 1800 deg. Fahrenheit of intense heat where standard bits fail at 800 deg. Fahrenheit, keeping the bit functional through rebar hits that would destroy ordinary tooling
• 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 in rebar-heavy 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 drilling accuracy
• Precision Tip design - delivers the stability and accuracy required for fast, precise hole placement in reinforced concrete for anchor setting applications
• Optimized flute design - removes dust faster, keeping the carbide head cooler for ultimate strength and durability during extended drilling sessions
• Wear mark indicator - ensures precise hole depth control so installers know exactly when the correct hole depth has been reached
• Compatible with corded and cordless SDS-Plus rotary hammers - optimized for maximum performance across a wide range of SDS-Plus power tools, giving professionals flexibility on the job site
• Made in the United States - domestic manufacturing supports consistent quality standards in a demanding product category

Why This Product

• When drilling through reinforced concrete, rebar contact is unavoidable - this bit is specifically engineered to survive rebar hits through its 4-cutter full carbide head and Tri-Metal Fusion Welding, where standard bits crack, break, or lose their edge prematurely
• Heat is the primary failure point for hammer drill bits in concrete applications - Dura-Carbide's ability to withstand up to 1800 deg. Fahrenheit (more than double the 800 deg. Fahrenheit threshold of standard bits) means this bit stays effective longer through continuous heavy use
• The 1/4 in. diameter and 10 in. working length make this bit well-suited for anchor setting in reinforced concrete slabs and walls where accurate, consistent hole depth is critical to structural performance
• Reduced vibration from the controlled 4-cutter design means less operator fatigue during extended drilling operations - a practical advantage on large commercial or industrial concrete projects

Specifications

• Brand: Diablo
• Model Number: DMAPL4090
• Sub-Brand: Rebar Demon
• Category: SDS-Plus 4-Cutter
• Diameter: 1/4 in.
• Length: 12 in.
• Working Length: 10 in.
• Shank: SDS-Plus
• Head Type: Full Carbide Head
• Number of Cutters: 4
• Compatible Tools: SDS-Plus Rotary Hammer Drill
• 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 installation

Frequently Asked Questions

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

This bit features a 4-cutter full carbide head that takes smaller bites of rebar for controlled, consistent carbide wear and reduced vibration. Combined with Dura-Carbide that withstands up to 1800 deg. Fahrenheit versus the 800 deg. Fahrenheit failure point of standard bits, and Tri-Metal Fusion Welding with up to 3X stronger welds, the Rebar Demon delivers up to 7X longer life compared to standard 2-cutter hammer drill bits.

Will this bit work with my cordless SDS-Plus rotary hammer?

Yes. This bit is optimized for maximum performance in both corded and cordless SDS-Plus rotary hammer drills, so it performs reliably whether you are using a corded tool on a job site with power access or a battery-powered rotary hammer in the field.

What is the working length of this bit, and why does it matter?

The working length - the portion of the bit that actively drills into the material - is 10 in., while the overall length is 12 in. Knowing the working length is important for anchor setting because it defines the maximum achievable hole depth, ensuring you can reach the required embedment depth in reinforced concrete applications.

What materials can this hammer drill bit drill through?

This bit is designed for use in reinforced concrete, concrete, rebar, and brick/block. The 4-cutter full carbide head and Dura-Carbide construction are specifically built to handle the extreme heat and impact generated when the bit encounters rebar embedded in concrete.