Description:

Key Features

Built for Rebar The Diablo DMAPL4230 hammer drill bit uses a 4-cutter full carbide head that takes smaller bites when you hit rebar. That means more controlled drilling, less chatter, and fewer ruined bits in reinforced concrete. Runs Cooler Longer Diablo's Dura-Carbide and optimized flute design help manage heat and clear dust faster. That matters when you're drilling repeated anchor holes and do not want the bit slowing down halfway through the job. Made to Last Tri-Metal Fusion Welding and an impact-resistant full carbide head are there for one reason: keep the head intact under heavy hammering. Diablo rates it for up to 7X longer life than standard 2-cutter hammer drill bits.

Overview

The Diablo DMAPL4230 5/8 in. x 10 in. x 12 in. Rebar Demon SDS-Plus 4-Cutter Full Carbide Head Hammer Drill Bit is built for drilling anchor and pass-through holes in concrete, reinforced concrete, block, brick, stone, and natural stone. This is a hammer drill bit designed for drilling fast, accurate holes in masonry, especially when rebar is part of the job. Model Number: DMAPL4230.

What makes this bit different from a basic masonry bit is the full carbide 4-cutter head. When you hit rebar, it is designed to take smaller bites instead of getting hung up or blowing out the cutting edge. On the job that means steadier progress, less vibration, and a better chance of finishing the hole with the same bit instead of walking back to the truck for a replacement.

Diablo also puts a lot of the story in the carbide itself. The Dura-Carbide design uses up to 2X more carbide and is built to handle temperatures up to 1800 degrees Fahrenheit, while standard bits are listed as failing at 800 degrees Fahrenheit. That kind of heat resistance matters when you're drilling repeated holes for anchors, handrails, conduit supports, wedge anchors, or concrete fastening and the bit never really gets a chance to cool down.

The flute design is not just there for looks. It is optimized to move dust out of the hole faster, which helps the head stay cooler and keeps drilling speed more consistent. If you drill concrete often, you already know dust buildup slows the cut, raises heat, and beats up the bit. Better dust removal is one of those details that saves time over a full day of drilling.

Accuracy is another strong point here. Diablo calls out a precision tip for improved stability and fast, precise hole making, plus a wear mark indicator to help maintain hole accuracy over the service life of the bit. That is useful for anchor setting, where hole diameter and depth need to stay consistent if you want hardware to fit and hold the way it should.

This bit uses an SDS Plus shank and is optimized for maximum performance in corded and cordless SDS Plus rotary hammers. It is also described as compatible with SDS Max rotary hammers for performance optimization, but the bit itself is clearly listed with an SDS Plus shank, so this is the setup you need to match. The 5/8 inch diameter, 10 inch working length, and 12 inch overall length give you reach for deeper concrete drilling without jumping to an oversized bit.

If you drill mostly plain block or softer masonry, a cheaper bit may get by. If your work regularly involves reinforced concrete, anchor installs, electrical runs, mechanical fastening, or commercial renovation where rebar is always a possibility, this is the kind of bit worth paying for. It is aimed at electricians, concrete contractors, general contractors, facility maintenance crews, and serious remodelers who need a masonry drill bit that holds up when the hole gets ugly.

Fast, Controlled Drilling in Reinforced Concrete

The cutting head is built for the part of the job that usually destroys standard bits: rebar contact. Instead of stalling out or chipping badly, this design is made for controlled wear and cleaner progress through reinforced concrete.

• 4-cutter full carbide head for concrete and concrete with rebar
• Up to 7X longer life versus standard 2-cutter hammer drill bits
• Precision tip helps start holes accurately and stay on line

What's in the Box

• (1) Diablo DMAPL4230 5/8 in. x 10 in. x 12 in. Rebar Demon SDS-Plus 4-Cutter Full Carbide Head Hammer Drill Bit

Key Specifications

Compatibility

Rotary Hammer Interface Fits tools with an SDS Plus shank interface. Tool Power Platform Optimized for use in corded and cordless SDS Plus rotary hammers. Material Applications Designed for concrete, reinforced concrete, block, brick, stone, and natural stone drilling.

Built For

Concrete Anchoring Electrical Mechanical / HVAC General Contracting Remodeling Commercial Maintenance Reinforced Concrete Drilling Masonry Fastening

Pro Tip

When you're setting anchors, pay attention to the wear mark indicator and keep the hole clear as you drill. That helps this 5/8 in. bit hold hole size more consistently, which is exactly what you want when the anchor fit matters.

Tool Nut's Take

Tool Nut's Take

Diablo DMAPL4230 hammer drill bit for guys tired of sacrificing bits to rebar

The Diablo DMAPL4230 is the kind of masonry drill bit that earns its keep the first time a normal bit quits when it finds steel.

• Who it's for: Pros and serious DIYers drilling anchor holes in concrete, especially where rebar strikes are common.
• Why it stands out: Full carbide 4-cutter head, strong weld, better heat handling, and a flute design that helps it keep drilling instead of packing up with dust.
• Worth knowing: This is an SDS Plus bit sold as a single piece, so make sure your rotary hammer matches the shank before you order.

Common Questions

• What type of tool does this bit fit? It uses an SDS Plus shank and is optimized for corded and cordless SDS Plus rotary hammers.
• Can it drill through rebar? Yes. It is designed for concrete with rebar and uses a 4-cutter full carbide head for better durability when steel is encountered.
• What is the drilling depth? The listed working length is 10 inches, with an overall length of 12 inches.
• What materials is it made for? It is made for concrete, reinforced concrete, block, brick, stone, and natural stone.