The Diablo 7/8" x 31" x 36" Rebar Demon SDS-Max 4-Cutter Full Carbide Head Hammer Drill Bit is engineered for professionals who need maximum durability and speed when drilling through reinforced concrete, concrete, brick, and block. Designed to work with SDS-Max rotary hammer drills, this carbide-tipped bit delivers precision, longevity, and heat resistance that far exceed standard 2-cutter alternatives - making it the go-to solution for anchor setting, structural drilling, and heavy-duty construction applications.

Key Features

• Up to 7X longer life versus standard 2-cutter hammer drill bits - drastically reduces bit replacement frequency and downtime on the job site
• Dura-Carbide construction features up to 2X more carbide that withstands up to 1800 deg. Fahrenheit of intense heat - combats rebar hits that would cause standard bits to fail at just 800 deg. Fahrenheit
• Impact Resistant 4-Cutter Full Carbide Head extracts smaller bites of rebar for controlled, consistent carbide wear and reduced vibration - delivers fast, precise holes even in the toughest reinforced concrete
• Tri-Metal Fusion Welding features up to 3X stronger weld to keep the full carbide head intact during extreme impact such as rebar - prevents head separation and tool failure in demanding conditions
• Precision Tip delivers stability and accuracy required for fast, precise holes - ideal for critical anchor setting in reinforced concrete where placement accuracy matters
• Optimized flute design removes dust faster, keeping the carbide head cooler for ultimate strength and durability - extends bit life and maintains cutting performance over longer run times
• Wear mark indicator ensures precise hole making - helps operators hit target depth consistently without over-drilling
• Optimized for maximum performance in corded and cordless SDS-Max rotary hammers - versatile enough to work across a wide range of job site tool setups

Why This Product

• When drilling through rebar-reinforced concrete, most standard bits fail due to extreme heat - this bit's Dura-Carbide head handles up to 1800 deg. Fahrenheit, meaning it keeps cutting where other bits break down
• The 4-cutter full carbide head design distributes impact stress more evenly than standard 2-cutter bits, resulting in reduced vibration and up to 7X longer service life - a direct cost and efficiency advantage on large reinforced concrete projects
• At 36" overall length with a 31" working length, this bit reaches deep into thick concrete slabs and walls - making it well suited for anchor setting and structural penetrations that shorter bits cannot reach
• Tri-Metal Fusion Welding keeps the carbide head bonded under extreme stress - giving users confidence that the bit will not fail mid-hole during high-powered hammer drilling or rebar strikes

Specifications

• Brand: Diablo
• MPN: DMAMX1200
• Category: SDS-Max 4-Cutter
• Diameter: 7/8"
• Length: 36"
• Working Length: 31"
• Shank: SDS Max
• Head Type: Full Carbide Head
• Number of Cutters: 4
• Compatible Tools: SDS-Max 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 more durable than a standard hammer drill bit?

The Rebar Demon uses Diablo's Dura-Carbide with up to 2X more carbide material than standard bits, and the 4-cutter full carbide head is bonded using Tri-Metal Fusion Welding for a weld up to 3X stronger. Together, these features allow the bit to withstand up to 1800 deg. Fahrenheit of heat - more than double the 800 deg. Fahrenheit threshold where standard bits fail - resulting in up to 7X longer service life.

What type of rotary hammer is required to use this bit?

This bit requires an SDS-Max rotary hammer drill. It is optimized for maximum performance in both corded and cordless SDS-Max rotary hammers.

Can this bit drill through rebar as well as concrete?

Yes. The 4-cutter full carbide head is specifically designed to handle rebar strikes by taking small, controlled bites of rebar rather than absorbing the full impact at once. This controlled carbide wear reduces vibration and keeps the bit intact during rebar contact in reinforced concrete drilling applications.

What does the wear mark indicator do?

The wear mark indicator is a built-in reference on the bit that helps operators drill to a precise depth. This ensures accurate, consistent hole making - particularly important in anchor setting applications where hole depth directly affects fastener performance.