Alpha Laser Core Bits - Wet/Dry Segmented Core BitsLaser-welded segmented diamond core bits engineered for fast, clean holes in granite, engineered stone, porcelain, and most hard interior surfaces. The 3/8" and 1/2" sizes are wet-only; 3/4" through 4" run wet or dry. All bits thread directly onto standard 5/8"-11 angle-grinder spindles for hand-held countertop, hardscape, and pool-deck work.Features Laser-welded segments - handle higher torque than brazed bonds 5/8"-11 thread fits any standard high-speed angle grinder Wet/Dry capability on 3/4"+ sizes; pavers can be drilled dry Maximum drilling depth: 4" per bit Sizes from 3/8" pilot holes up to 4" sink-radius corners Complete 11-piece kit (DLB11KIT) ships in a hard-shell toolbox .dst-accordion { margin-top: 25px; border: 1px solid #FDDCC5; border-radius: 6px; overflow: hidden; } .dst-accordion-item { border-bottom: 1px solid #FDDCC5; } .dst-accordion-item:last-child { border-bottom: none; } .dst-accordion-toggle { display: none; } .dst-accordion-label { display: flex; justify-content: space-between; align-items: center; padding: 14px 20px; cursor: pointer; font-size: 17px; font-weight: 700; color: #231F20; background: #fff; transition: background 0.2s; } .dst-accordion-label:hover { background: #FFF3EB; } .dst-accordion-label::after { content: '+'; font-size: 22px; font-weight: 700; color: #F15C22; transition: transform 0.3s; } .dst-accordion-toggle:checked + .dst-accordion-label { background: #FFF3EB; } .dst-accordion-toggle:checked + .dst-accordion-label::after { content: '\2212'; } .dst-accordion-content { max-height: 0; overflow: hidden; transition: max-height 0.4s ease; padding: 0 20px; background: #fff; } .dst-accordion-toggle:checked ~ .dst-accordion-content { max-height: 5000px; padding: 15px 20px 20px; } Models / Part Numbers Part No. Diameter Max RPM Wet/Dry Weight UPC WLB00380 3/8" 12,000 Wet Only 0.4 lb 749173462498 WLB00500 1/2" 12,000 Wet Only 0.4 lb 749173462504 DLB00750 3/4" 12,000 Wet/Dry 0.5 lb 749173462269 DLB01000 1" 12,000 Wet/Dry 0.5 lb 749173462276 DLB01250 1-1/4" 12,000 Wet/Dry 0.6 lb 749173462283 DLB01375 1-3/8" 12,000 Wet/Dry 0.6 lb 749173462290 DLB01500 1-1/2" 12,000 Wet/Dry 0.7 lb 749173462306 DLB02000 2" 12,000 Wet/Dry 1.0 lb 749173462313 DLB02500 2-1/2" 8,400 Wet/Dry 1.3 lb 749173462320 DLB03000 3" 8,400 Wet/Dry 2.0 lb 749173462337 DLB04000 4" 8,400 Wet/Dry 3.0 lb 749173462344 DLB11KIT Kit 12,000 / 8,400 Wet & Wet/Dry 14.10 lb 749173462559 How to Use Thread the bit onto a 5/8"-11 angle grinder. Hand-tighten only - never wrench-tighten. For wet drilling, supply water continuously to the cut zone (G-Tape reservoir or hose feed). Use a pilot carbide bit or jig to stabilize hand-held starts on smooth surfaces. Maintain steady pressure - let the diamonds cut. Avoid percussion / hammering, which destroys the diamond grit. Pull the bit back every inch of depth to flush slurry and cool the segments. Maximum drilling depth per bit is 4". Use the Alpha Core Bit Extender for deeper holes. Specifications by Variant WLB00380 Part No. WLB00380 WLB00500 Part No. WLB00500 DLB00750 Part No. DLB00750 DLB01000 Part No. DLB01000 DLB01250 Part No. DLB01250 DLB01375 Part No. DLB01375 DLB01500 Part No. DLB01500 DLB02000 Part No. DLB02000 DLB02500 Part No. DLB02500 DLB03000 Part No. DLB03000 DLB04000 Part No. DLB04000 DLB11KIT Part No. DLB11KIT Common Specifications Property Detail Tool Type Diamond Core Bit Bond Laser-Welded Segments Thread 5/8"-11 Max Drilling Depth 4" Country of Origin Japan Commodity Code 8207.19.3060 Related & Companion Products Alpha Vacuum-Brazed Diamond Core Bit Alpha 1-1/4" or 1-3/8" Dry Core Bits Alpha Drill Bit Guide / Water Delivery System (WDS138) Alpha Nichigo G-Tape 3045 (water reservoir) FAQs Can I drill porcelain pavers dry?Yes. Porcelain pavers and most hardscape stone can be drilled dry with the DLB-series bits. The WLB 3/8" and 1/2" are wet-only.Why does my bit lose its bite quickly?Most often percussion or hammering - these destroy the diamond grit. Let the bit cut under steady pressure, and use water on deep applications to flush swarf.How deep can I drill with one bit?4" is the maximum drilling depth. Use the Alpha Core Bit Extender for deeper holes.Do I need a pilot bit for hand-held work?Yes - a carbide pilot bit or drilling jig stabilizes the start on smooth surfaces and prevents walking.Will these work on my angle grinder?Any standard high-speed grinder with a 5/8"-11 spindle. Stay at or below the listed Max RPM (12,000 for under 2", 8,400 for 2-1/2"-4"). VideosNo product-specific videos are currently available from the manufacturer or DST. Documentation 📄 Laser Core Bit & Extender Flyer (PDF) 📄 Laser Core Bits for Stone Flyer (PDF) 📄 Laser Core Bit Kit Flyer (PDF) ⚠ WARNING: Cancer and Reproductive Harm — www.P65Warnings.ca.gov. Always wear appropriate PPE.⚠ WARNING: Drilling stone, concrete, and porcelain can produce respirable crystalline silica dust known to the State of California to cause cancer, lung disease, and reproductive harm. Always wear appropriate PPE.
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