The Diablo 1/2" x 16" x 21" Rebar Demon SDS-Max 4-Cutter Full Carbide Head Hammer Drill Bit is engineered for professionals who demand maximum performance when drilling through reinforced concrete, concrete, brick, and block. Diablo built this bit around a full carbide head with four cutting edges, delivering faster penetration rates, reduced vibration, 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 block walls with a high-powered SDS-Max rotary hammer, this bit is purpose-built to handle the punishment that stops standard bits cold.

Key Features

• Up to 7X longer life versus standard 2-cutter hammer drill bits - fewer bit changes on the job site means more uptime and lower overall tooling cost per hole.
• Dura-Carbide construction features up to 2X more carbide that withstands up to 1800 deg. Fahrenheit of intense heat, compared to standard bits that fail at 800 deg. Fahrenheit - keeps cutting through rebar strikes that would destroy ordinary bits.
• Impact Resistant 4-Cutter Full Carbide Head extracts smaller bites of rebar for controlled, consistent carbide wear and reduced vibration - delivers fast, precise holes without the jarring shock that fatigues the operator and damages the tool.
• 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 even under the stress of high-powered hammer drills.
• Precision Tip delivers stability and accuracy required for fast, precise holes - eliminates bit walking on hard surfaces and ensures accurate anchor placement on the first pass.
• Optimized flute design removes dust faster, keeping the carbide head cooler for ultimate strength and durability - better dust evacuation extends bit life and reduces heat buildup in deep hole applications.
• Wear mark indicator ensures precise hole making - lets the operator confirm correct embedment depth without stopping to measure repeatedly.
• Optimized for maximum performance in corded and cordless SDS-Max rotary hammers - compatible with a wide range of professional-grade drilling equipment for versatile use on any job site.

Why This Product

• Rebar encounters that destroy standard bits are manageable with this bit's full carbide head and Tri-Metal Fusion Welding - making it a reliable choice for drilling in reinforced concrete where rebar hits are unavoidable.
• The combination of a 4-cutter head and optimized flute geometry means holes are drilled faster and cooler than with conventional bits, reducing both cycle time and wear on your SDS-Max rotary hammer.
• With a 16" working length on a 21" overall body, this bit reaches deep into thick concrete slabs and walls for anchor setting applications that shorter bits simply cannot access.
• Engineered to perform in both corded and cordless SDS-Max hammers, this bit adapts to the power source available on site without sacrificing speed or hole quality in concrete, brick, or block.

Specifications

• Brand: Diablo
• Model Number: DMAMX1030
• Category: SDS-Max 4-Cutter
• Diameter: 1/2"
• Overall Length: 21"
• Working Length: 16"
• 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 drilling for anchor setting and through-hole applications

Frequently Asked Questions

What makes the Rebar Demon bit different from a standard 2-cutter SDS-Max bit?

The Rebar Demon uses a 4-cutter full carbide head made with Dura-Carbide, which features up to 2X more carbide than standard bits and can withstand up to 1800 deg. Fahrenheit of heat - compared to the 800 deg. Fahrenheit limit of standard bits. The Tri-Metal Fusion Welding process creates a weld up to 3X stronger, and the result is up to 7X longer service life versus standard 2-cutter hammer drill bits.

Will this bit work in a cordless SDS-Max rotary hammer?

Yes. This bit is optimized for maximum performance in both corded and cordless SDS-Max rotary hammers, so it is compatible with the full range of professional SDS-Max equipment regardless of power source.

What is the difference between the overall length and the working length?

The overall length of this bit is 21", which includes the SDS-Max shank. The working length - the portion of the bit that actively drills into the material - is 16". This is the maximum usable drilling depth the bit can achieve in reinforced concrete, concrete, brick, or block.

What does the wear mark indicator do?

The wear mark indicator is a visual reference built into the bit that allows the operator to confirm precise hole depth during drilling. This is especially useful when setting anchors in reinforced concrete, where embedment depth must meet specific requirements without stopping to manually measure the hole multiple times.