The Diablo Rebar Demon 3/16" x 10" x 12" SDS-Plus 4-Cutter Full Carbide Head Hammer Drill Bit is engineered for professionals who need a high-endurance solution when drilling into reinforced concrete, standard concrete, rebar, and brick or block. Built with Diablo's proprietary Dura-Carbide and Tri-Metal Fusion Welding technology, this hammer drill bit delivers exceptional performance in the most demanding anchor-setting and structural drilling applications - outpacing standard 2-cutter bits in speed, heat resistance, and working life. Designed for use with corded and cordless SDS-Plus rotary hammer drills, it is the go-to bit when precision and durability in rebar-embedded concrete are non-negotiable.

Key Features

• Up to 7X longer life versus standard 2-cutter hammer drill bits - fewer bit changes on the job site mean more uptime and lower cost per hole drilled.
• Dura-Carbide with up to 2X more carbide - withstands up to 1800 deg. Fahrenheit of intense heat, far exceeding the 800 deg. Fahrenheit threshold where standard bits fail, so the bit keeps cutting even through heat-generating rebar strikes.
• Impact Resistant 4-Cutter Full Carbide Head - extracts smaller bites of rebar for controlled, consistent carbide wear and reduced vibration, delivering fast, precise holes in reinforced concrete without sacrificing bit integrity.
• Tri-Metal Fusion Welding with up to 3X stronger weld - keeps the full carbide head intact during extreme impact such as rebar contact, reducing the risk of head separation and extending bit service life.
• Precision Tip - delivers the stability and accuracy required for fast, precise holes, making it ideal for anchor-setting work where hole placement is critical.
• Optimized flute design removes dust faster - keeping the carbide head cooler for ultimate strength and durability during extended drilling sessions in concrete or block.
• Wear mark indicator - ensures precise hole-making depth is maintained consistently across multiple holes, reducing the chance of under- or over-drilling.
• Optimized for maximum performance in corded and cordless SDS-Plus rotary hammers - giving contractors flexibility to use the bit with their existing tool lineup without performance compromise.

Why This Product

• When drilling into rebar-embedded concrete, standard bits fail at 800 deg. Fahrenheit - this bit's Dura-Carbide construction tolerates up to 1800 deg. Fahrenheit, meaning it stays sharp and intact through conditions that destroy ordinary hammer drill bits.
• The 4-cutter full carbide head design takes smaller, controlled bites of rebar rather than absorbing full impact forces, which translates directly into reduced vibration for the operator and measurably longer bit life in real-world reinforced concrete work.
• With a 10" working length in a 12" overall bit, this 3/16" diameter bit reaches depth requirements for anchor setting in thick concrete slabs and walls while the SDS-Plus shank ensures positive engagement with any compatible rotary hammer.
• Made in Germany with Tri-Metal Fusion Welding, the full carbide head is built to resist heat and prevent breakage in extreme impact situations - giving contractors confidence when working in conditions where bit failure causes costly delays.

Specifications

• Brand: Diablo
• Sub-Brand: Rebar Demon
• Model Number: DMAPL4055
• Diameter: 3/16"
• Length: 12"
• Working Length: 10"
• 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: Germany

Approved Applications

• Reinforced concrete and concrete

Frequently Asked Questions

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

The Rebar Demon features a 4-cutter full carbide head made with Dura-Carbide that contains up to 2X more carbide than standard bits and withstands up to 1800 deg. Fahrenheit of heat - compared to standard bits that fail at 800 deg. Fahrenheit. The 4-cutter design takes smaller bites of rebar for controlled carbide wear, reduced vibration, and up to 7X longer life versus standard 2-cutter hammer drill bits.

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

Tri-Metal Fusion Welding is Diablo's manufacturing process used to bond the full carbide head to the bit body. It produces up to 3X stronger weld strength compared to standard welding, keeping the carbide head intact during extreme impact events such as rebar strikes - reducing the risk of breakage and helping the bit perform reliably under the stress of high-powered hammer drills.

What rotary hammers are compatible with this bit?

This bit is compatible with SDS-Plus rotary hammer drills and is optimized for maximum performance in both corded and cordless SDS-Plus models. The SDS-Plus shank provides secure positive engagement with any compatible rotary hammer chuck.

What does the wear mark indicator do?

The wear mark indicator is a visual reference built into the bit that helps the operator maintain consistent drilling depth across multiple holes. This is especially useful for anchor-setting work in reinforced concrete where precise hole depth is required for proper fastener engagement.