The Diablo DMAPL9930-S6 6pc SDS-Plus Rebar Demon 4-Cutter Full Carbide Head Hammer Drill Bit & Chisel Set is a 6-piece accessory set for SDS-Plus rotary hammers. This is a hammer drill bit and chisel set designed for drilling anchor holes in concrete, concrete with rebar, brick, and block, while also covering basic demolition and material-clearing work. Model Number: DMAPL9930-S6. If you run a rotary hammer on real jobs instead of occasional weekend use, this set makes sense because it covers the common small-hole sizes plus two useful chisels in one case-ready package.

The core of this set is Diablo's Rebar Demon 4-cutter full carbide head design. That matters because rebar is where a lot of standard masonry bits start to chip, slow down, or quit. Diablo calls out Dura-Carbide for impact and high-heat resistance, along with a Precision Tip for stable starts and accurate holes. In plain terms, that means cleaner hole placement and less wandering when you are drilling for anchors, hangers, or mechanical fastening points.

Diablo also uses Tri-Metal Diffusion Bonding, and Home Depot lists Tri-Metal Fusion Welding with a stronger weld claim. However you phrase it, the practical takeaway is the same: the carbide head is built to stay intact under heavy impact, especially when the bit meets rebar. That is one of the big reasons pros step up from basic 2-cutter masonry bits. Diablo also states up to 7X longer life versus standard 2-cutter hammer drill bits, which lines up with the set's jobsite focus.

The four-flute design is not just a spec sheet detail. Faster dust removal helps keep the bit running cooler and cuts down on wasted time clearing debris from the hole. When you are drilling repeated holes in concrete, that adds up to more consistent drilling speed and less stress on both the bit and the rotary hammer. The SDS-Plus shank keeps the set in the lane it belongs in: compact and mid-size rotary hammers used for anchor work, retrofit work, and punch-list drilling.

What separates this kit from a straight drill-bit pack is the inclusion of both a flat chisel and a point chisel. That gives you a simple switch from drilling to breaking, clearing, or joint cleanup without digging for another accessory set. Diablo positions the chisels for general demolition, adjustment work, restoring joints, and clearing reinforcements, and the heat-treated steel body is there to hold up to repeated impact in concrete.

Compatibility is straightforward. This set is optimized for corded and cordless SDS-Plus rotary hammers. It is not a general-purpose round-shank masonry set and it is not meant for standard drill chucks. If your tool accepts SDS-Plus accessories, this set is built for that platform. That makes it a good fit for contractors and serious DIY users already working with SDS-Plus tools who want a compact set that handles both drilling and light chipping.

Who should buy it? Electricians, plumbers, HVAC installers, remodelers, general contractors, and maintenance crews will get the most out of it. It covers the common need to drill small to mid-size holes in masonry for anchors and fasteners, then switch over to light surface removal or cleanup with the chisels. If you mostly drill wood and metal, this is the wrong kit. If you live in concrete and block, the Diablo DMAPL9930-S6 6pc SDS-Plus Rebar Demon 4-Cutter Full Carbide Head Hammer Drill Bit & Chisel Set is built for the kind of work that eats basic bits.

Diablo DMAPL9930-S6 6pc SDS-Plus Rebar Demon 4-Cutter Full Carbide Head Hammer Drill Bit & Chisel Set Gets the Basics Right

This is a smart SDS-Plus set for the user who drills concrete regularly and wants better durability than bargain masonry bits without overthinking the buy.

• Who it's for: Pros and serious DIY users running SDS-Plus rotary hammers for anchors, fastening points, retrofit work, and occasional chipping or cleanup.
• Why it stands out: The full carbide Rebar Demon bits, four-flute dust removal, and included flat and point chisels make it more useful than a basic bit-only pack.
• Worth knowing: This is an SDS-Plus accessory set, so it is the right call for rotary hammers, not standard drill chucks.

• What tools does this set fit? It is designed for SDS-Plus rotary hammers and is optimized for both corded and cordless SDS-Plus tools.
• What materials is it made to drill? This set is intended for concrete, concrete with rebar, brick, and block.
• Are these standard 2-cutter masonry bits? No. Diablo positions these as Rebar Demon 4-cutter full carbide head hammer drill bits.
• Does this set include chisels as well as drill bits? Yes. It includes a flat chisel and a point chisel in addition to four hammer drill bits.