Product Name: Water Drill Extension Rod. Material: 45# Steel. Colour: Silver (as pictured). Dimensions: (Optional) 160mm/200mm/233mm/310mm/400mm/500mm/1000mm. Drilling or coring operations in reinforced concrete and brick walls. Air conditioning installation, pipe laying, road marking drilling. Drilling and coring operations for motorway and outdoor engineering projects. Compatible with most commercially available drill rigs for broader application. Premium threaded socket interface facilitates drill bit attachment/detachment. Precision steel tube body: High hardness minimises deformation, exceptional wear resistance. Cutting edge: Thick grinding wheel ensures wear resistance and damage prevention, maintaining sharpness. Water must be used when operating water-cooled drills. Fixed or handheld drill rigs are recommended. Before installing the drill bit, inspect the spindle for wobble and verify the condition of electrical components. Ensure the spindle is securely fastened and maintains concentricity during bit installation. Actual product colours may vary slightly from website images due to monitor brightness and ambient lighting conditions. Data may contain manual measurement discrepancies; your understanding is appreciated. 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.