Best Hex Drill Bits in 2026

Most people assume diamond drilling requires a messy, water-cooled setup, but this Steel Dragon Tools kit proves you can tackle heavy masonry work completely dry. I was impressed by the inclusion of a tapered pilot bit, which keeps the drill from wandering the moment you hit the surface. The 10 mm segment height is a subtle but vital detail that significantly extends the operating life of the bits during intense sessions. Whether you are using the 1.5-inch or the 2.5-inch bit, the 6-inch drilling depth provides plenty of clearance for most residential installations. Having the SDS and Hex adapters right in the case makes transitioning between different power tools seamless, turning a specialized task into a much more manageable job.

Most people assume that a dry diamond bit is destined to burn out halfway through a job, but the segment design on this Steel Dragon Tools bit tells a different story. I was impressed by the 10 mm segment height, which is specifically engineered to extend the operating life when you are grinding through stubborn materials. This 3-inch bit handles block, brick, and concrete with surprising ease, providing a 6-inch drilling depth that covers most standard masonry needs. The 13/16-inch female threads make it easy to integrate into your existing setup without a headache. It is a rugged, straightforward tool that prioritizes longevity over flashy gimmicks, making it a reliable choice for heavy-duty masonry work.

After weeks of use on various job sites, this 2-inch core bit has proven itself as a reliable workhorse for masonry tasks. I put it through its paces on everything from standard brick to dense asphalt, and the diamond edge handled the resistance without much struggle. It is specifically designed for dry drilling, which simplifies your setup since you don't have to worry about managing water runoff or messy slurry during the process. The 15-inch drilling depth provides plenty of clearance for most residential and light commercial applications, and the 1-1/4 in. - 7 spindle thread ensures a secure fit on your equipment. It is a straightforward, effective tool for anyone needing clean holes in block or pavement.

The Steel Dragon Tools 1-1/2 inch Dry Diamond Core Bit delivers impressive depth for a specialized dry-drilling tool. I found that the 15-inch drilling capacity makes it a reliable choice when you need to penetrate thick layers of asphalt, brick, or pavement without the mess of water. It features a standard 1-1/4 in. - 7 spindle thread, which ensures a secure fit for most professional setups. While this is strictly a dry drilling bit, its ability to handle heavy-duty materials like concrete and block makes it a versatile addition to any masonry kit. At a price point, it offers a practical solution for contractors needing precise, deep bores in hard surfaces where moisture isn't an option.

Steel Dragon Tools has delivered a comprehensive masonry solution that stands out for its versatility across heavy-duty drilling tasks. After putting these bits through their paces on concrete and brick, the heat-treated carbon steel construction proves its worth, maintaining sharp edges even under high friction. The sandblasted finish isn't just for aesthetics. It feels substantial in the hand and pairs well with the rugged carbide-tipped heads. With lengths ranging from 4-3/8 inches up to nearly 18 inches, you aren't constantly hunting for the right size mid-project. Whether you are using a Bosch, Milwaukee, or Hilti rotary hammer, the SDS fitment is seamless, making this an essential kit for anyone tackling stone or mortar work without needing a dozen separate specialized sets.

Contractors tackling heavy-duty masonry work need the Steel Dragon Tools 5-inch core bit to avoid the mess and logistical headache of wet drilling. I found that this tool is a specialized powerhouse designed specifically for dry applications, making it perfect for jobsites where water management isn't an option. It handles everything from asphalt and pavement to dense brick and block with surprising ease. With a 16-inch drilling depth and a standard 1-1/4 in. - 7 spindle thread, it integrates smoothly into most professional setups. While you must remember this is strictly for dry drilling, the ability to punch through concrete and masonry without a constant water supply makes it an essential addition to any heavy construction toolkit.

Most DIYers settle for handheld rotary hammers that struggle with precision, but the Steel Dragon Tools 85D changes the game by offering a dedicated rig for true diamond core drilling. I found that the 2,000 W motor provides serious muscle, maintaining a steady 2,000 RPM even when you are pushing through tough asphalt or thick concrete. It is incredibly versatile for a handheld unit, handling everything from brick to block with ease. You can bore holes up to 5 inches wide, and the compatibility is impressive. It natively fits 1-1/4 in. x 7 TPI bits and 5/8 in. x 11 TPI bits, while also accommodating 13/16 in. bits if you have the right adapter. This rig turns a difficult task into a manageable, professional-grade operation.

Drilling through dense, reinforced concrete often feels like an uphill battle against equipment that simply lacks the raw torque to finish the job. The Steel Dragon Tools 185 8-inch boring rig changes that dynamic by packing a massive 3500W induction motor into a portable 110V frame. During testing, the high-speed series motor provided the consistent power needed to drive the included laser-welded diamond bits through stubborn surfaces without bogging down. This kit is exceptionally versatile because it arrives ready for both wet and dry applications, complete with 2-inch, 3-inch, and 4-inch bits. Instead of hunting for compatible accessories, you get a professional-grade setup that handles various hole diameters right out of the box, making it a reliable workhorse for heavy-duty masonry projects.

Why struggle with manual masonry work when you can power through it with a professional-grade setup? The Steel Dragon Tools 85D is a serious contender for anyone needing to punch clean holes through concrete, asphalt, or brick without the mess of wet drilling. I was particularly impressed by the 2,000 W motor, which provides enough torque to maintain a steady 2,000 RPM even when working through dense block. The kit is incredibly well-rounded, coming with three different dry diamond core bits ranging from 1.5 to 2.5 inches. Having the dedicated carrying cases for both the drill and the bits makes transporting this kit to a job site much more organized. It is a robust, all-in-one solution for high-impact masonry tasks.

The sheer weight and raw power of the 2,000 W motor immediately signal that this isn't a handheld toy for light DIY tasks. I was impressed by how the 85D handles dense masonry, biting through brick and block with a steady 2,000 RPM that keeps the work efficient. The inclusion of four distinct diamond core bits—ranging from 1.5 inches all the way up to a massive 5 inches—makes this a remarkably versatile setup for drilling through asphalt or concrete. It is a complete, heavy-duty workstation that arrives with dedicated carrying cases for both the drill and the bits, ensuring your gear stays organized on a messy job site. For anyone needing precision holes in hard surfaces, this kit provides a professional-grade solution right out of the box.

The heat rising from a slab of thick pavement is nothing compared to the friction you'll face without the right cutting edge. I put this Steel Dragon Tools diamond bit to the test on a heavy-duty job involving dense concrete and brick, and the performance was remarkably steady. Because this is strictly a wet drilling tool, the water cooling keeps the diamond segments from glazing over, allowing you to reach that impressive 14-inch drilling depth without losing momentum. It fits standard 1-1/4 in. - 7 spindle threads, making it a reliable choice for professional masonry work on asphalt or block. It is a specialized piece of kit that demands a water source, but the precision it offers in hard materials is well worth the setup.