18-350mm Pipe Drill Wet 370mm Diamond Core Wall Floor Drill Bit Deep Hole Saw. Aerospace-Grade Alloy Steel Head? : Cr-Mo-V alloy construction with HRC62+ hardness, 300% wear resistance boost, capable of piercing reinforced concrete. Dual Helix Flute Design? : 304 stainless steel body with deep debris channels ensures smooth dry/wet drilling without clogging. Diamond Coating Technology? : Nano-diamond particle coating extends lifespan 5x longer than standard bits, ideal for granite/marble. Rapid Drilling? : 15cm/min penetration in C30 concrete (63mm diameter), reduces vibration noise by 60% with water cooling. Universal Compatibility? : Fits 11000 RPM drills including Hilti, no adapter required. Precision Cutting? : Laser-balanced concentricity. Cooling Protocol? : Limit dry drilling to 30-second intervals; water cooling recommended for prolonged use. Safety Alert? : Wear goggles and dust masks; never rotating bit. Storage? : Keep in dry environment with anti-rust oil coating. Construction: Wall penetration (HVAC/electrical conduits). Renovation: Porcelain tile/stone cutting (embedded fixtures). Municipal: Road marker installation, utility access hole expansion. Product Name:18-350mm Pipe Drill Wet 370mm Diamond Core Wall Floor Drill Bit Deep Hole Saw. Package included: according to your choice. Select your requirements from the drop down menu above. This Product Is Available in Different Dimensions and Can Be Customized to Your Specific Needs. We Are Happy to Help! Due to computers display colors differently, the color may vary slightly from the above images, Thanks for your understanding! Due to different manual measurement methods, the size may be slightly different, please understand. All products in our store are elaborately made. We care about our valued buyers, if you have any questions, our Customer Service staff will be very glad to help you. We try our best to reply to your emails as soon as possible, however, due to the high volume of daily incoming emails and time zone difference, we may not be able to reply to your emails immediately. Please contact me before you return it. Feedback is very important to us. For the functional products in our shop, we make sure that the functions are the same as the description. About the product colour:Because of the different light and environment when the product is photographed, In a few instances the colour of the product may have a little colour difference with the actual colour of the product, I hope you can understand.