The Diablo Rebar Demon 1/4" x 16" x 18" SDS-Plus 4-Cutter Full Carbide Head Hammer Drill Bit is engineered for professionals who demand maximum durability and speed when drilling through reinforced concrete, concrete, brick, and block. Diablo's Rebar Demon line represents a revolutionary approach to hammer drill bit design, combining a full carbide head, advanced heat resistance, and precision geometry to outperform standard 2-cutter bits in the most demanding anchor-setting and concrete drilling applications.

Key Features

• Up to 7X longer life versus standard 2-cutter hammer drill bits - dramatically reduces bit replacement frequency and downtime on the job site, lowering overall cost per hole.
• Dura-Carbide with up to 2X more carbide withstands up to 1800 deg. Fahrenheit of intense heat - stays intact and cutting where standard bits fail at 800 deg. Fahrenheit, keeping you drilling through rebar hits without stopping.
• Impact Resistant 4-Cutter Full Carbide Head extracts smaller bites of rebar - delivers controlled, consistent carbide wear and reduced vibration so you get fast, precise holes even in heavily reinforced concrete.
• Tri-Metal Fusion Welding features up to 3X stronger weld - keeps the full carbide head securely bonded during extreme rebar impacts, preventing catastrophic head loss and protecting your investment.
• Precision Tip delivers stability and accuracy for fast, precise holes - essential for anchor setting in reinforced concrete where hole placement and diameter consistency are critical.
• Optimized flute design removes dust faster, keeping the carbide head cooler - maintains ultimate carbide strength and durability throughout the life of the bit by reducing heat buildup during continuous drilling.
• Wear mark indicator ensures precise hole making - gives the operator a clear visual reference to achieve consistent hole depths without guesswork.
• Optimized for maximum performance in corded and cordless SDS-Plus rotary hammers - works with your existing tool investment whether on the cord or running on battery power.

Why This Product

• When drilling through rebar is unavoidable, standard bits crack or fail at 800 deg. Fahrenheit - the Rebar Demon's Dura-Carbide head tolerates up to 1800 deg. Fahrenheit, making it the right choice for heavily reinforced structural concrete where rebar strikes are expected.
• The 4-cutter full carbide head combined with Tri-Metal Fusion Welding means up to 3X stronger weld integrity, reducing the risk of head separation under high-impact hammer drilling - a critical safety and productivity advantage on commercial and industrial job sites.
• With up to 7X longer service life versus standard 2-cutter bits, this 1/4" bit is a cost-effective solution for contractors drilling high volumes of anchor holes in concrete and masonry, reducing tool expenditure per project.
• The 18" overall length with a 16" working length gives access to deep embedment depths required for anchor setting in thick reinforced concrete slabs and walls, where shorter bits simply cannot reach.

Specifications

• Brand: Diablo
• Sub-Brand: Rebar Demon
• Model Number: DMAPL4100
• Diameter: 1/4"
• Length: 18"
• Working Length: 16"
• Shank: SDS Plus
• Head Type: Full Carbide Head
• Number of Cutters: 4
• Category: SDS-Plus 4-Cutter
• Compatible Tools: SDS-Plus Rotary Hammer Drill
• Compatible 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 the Rebar Demon different from a standard hammer drill bit?

Standard 2-cutter hammer drill bits typically fail when the carbide head reaches approximately 800 deg. Fahrenheit, which can happen quickly during rebar strikes. The Rebar Demon uses Diablo's Dura-Carbide with up to 2X more carbide material that withstands up to 1800 deg. Fahrenheit of intense heat. Combined with a 4-cutter full carbide head and Tri-Metal Fusion Welding for up to 3X stronger weld strength, the result is up to 7X longer service life versus standard 2-cutter bits.

What rotary hammer tools are compatible with this bit?

This bit uses an SDS-Plus shank and is optimized for maximum performance in both corded and cordless SDS-Plus rotary hammer drills. It is not compatible with SDS-Max tool chucks.

Can this bit drill through rebar without destroying the carbide head?

Yes. The 4-cutter full carbide head is specifically impact resistant and is designed to take small, controlled bites of rebar rather than absorbing the full force of a rebar strike in one pass. This controlled material removal reduces vibration and delivers consistent carbide wear, which is what enables the extended service life compared to conventional bits.

What is the effective working length of this bit, and why does it matter for anchor setting?

This bit has a 16" working length out of an 18" overall length. The extended working length allows for deep embedment holes in thick reinforced concrete slabs, walls, and footings - critical when anchor specifications require deeper hole depths that shorter standard bits cannot achieve. A wear mark indicator is also included to help ensure consistent, precise hole depths throughout use.