The Diablo DMAPL2350 1/2 Inch x 37 Inch x 39 Inch SDS-Plus 2-Cutter Carbide-Tipped Hammer Drill Bit is built for drilling deep holes in concrete, brick, and block with an SDS-Plus rotary hammer. This is a hammer drill bit designed for masonry drilling and anchor-hole work. Model Number DMAPL2350. If you need extra reach without stepping up to a different shank system, this bit gives you a 1/2 inch diameter, 39 inch overall length, and 37 inch working length in a single-piece setup.

What matters here is how the cutting end and flute design work together. The 2-cutter carbide tip is made for fast, controlled drilling in masonry, while Diablo's Peak Point tip helps the bit start cleanly instead of skating around on the surface. That saves time when you're drilling repeated holes overhead, through wall assemblies, or for anchors where placement needs to be right the first time.

Diablo also calls out its Dura-Carbide construction plus an optimized brazing and hardening process. In plain terms, that means the carbide tip is built to handle the heat and repeated impact that come with hammer drilling, so the edge holds up longer and productivity stays more consistent over the life of the bit. For anyone boring multiple holes in cured concrete or block, longer tip life is not just a durability spec, it is less downtime and fewer bit changes.

The 4-flute body is another practical feature. On long bits, dust removal matters because packed dust slows drilling, builds heat, and makes deep holes more frustrating than they need to be. Diablo's optimized flute design is intended to move debris out faster and keep the carbide head cooler, which is especially useful on 37 inch drilling depth jobs where you are reaching deep into masonry.

This bit uses an SDS Plus shank and is optimized for both corded and cordless SDS-Plus rotary hammers. That gives it solid compatibility across a wide range of modern rotary hammers without needing adapters. It is a straightforward fit for contractors and maintenance crews already working on the SDS Plus platform and looking for a long-reach masonry drill bit for concrete fastening, penetrations, or retrofit work.

Who is this for? Masonry contractors, electricians, plumbers, HVAC installers, general contractors, and remodelers who need to drill long, accurate holes through concrete, brick, or block. The extra length is the real story here. If your work regularly calls for deep drilling through structural masonry or extended reach for routing pipe, cable, anchors, or sleeves, this is the kind of specialized bit that earns its spot in the case.

Diablo DMAPL2350 Hammer Drill Bit for Long, Deep Masonry Holes

The Diablo DMAPL2350 makes sense when you need real reach in an SDS-Plus setup and do not want to give up fast starts, dust clearing, or carbide life to get it.

• Who it's for: Pros drilling deep holes in concrete, brick, and block for anchors, penetrations, or retrofit work.
• Why it stands out: The combination of 37 inch working length, Peak Point tip, Dura-Carbide construction, and 4-flute dust removal gives this masonry drill bit practical jobsite value beyond just being long.
• Worth knowing: This is a single SDS Plus hammer drill bit, not a set, and it is purpose-built for rotary hammer use in masonry materials.

• What tools does this bit fit? It fits SDS-Plus rotary hammers and is optimized for both corded and cordless SDS-Plus models.
• What materials is it designed to drill? It is designed for concrete, brick, and block.
• What is the working length? The working length is 37 inches, with an overall bit length of 39 inches.
• What type of tip does it use? This bit uses a carbide-tipped 2-cutter head.