Features: *Long and tartness Carving Drill Needle: This tool is designed for drilling deep holes in jade beads, pipes, or hollowing out jade. It is recommended to use this grinding needle on a punching machine to achieve optimal results. Requires water cooling during use. *High-quality Material: Made of electroplated corundum and iron, durability and long-lasting performance. The electroplated corundum particles are tartness and uniform, enabling faster and more efficient grinding. *Versatile Functionality: This tool can grind deeper into the inner gap of the workpiece, allowing for precise and intricate grinding. It is suitable for various materials such as jade, gemstones, and agate. *Fine Sand Abrasive: The grinding needle features fine sand abrasive, which offers tartness and fast grinding. With this tool, you can achieve a smooth and polished appearance on your desired workpiece. *Easy to Use: Simply attach the grinding needle to a punching machine, and it is ready to use. Its lightweight design and ergonomic handle provide ease and comfort during operation. Specifications: *Product Name:Carving and lengthening punching needle rod *Material:Electroplated corundum + iron *Size:As Picture Shown *Color:silver Package Content: *Engraving punch needle or 7*Engraving punch needle Note: . The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness. 2. Please allow slight manual measurement deviation for the data. Long and Carving Drill Needle】Specifically designed for deep holes, hollowing out jade, or carving pipes, this tool ensures optimal results when used with a punching machine. Water cooling is recommended during use to achieve the best performance. Material】Made from electroplated corundum and iron, this tool guarantees durability and long-lasting performance. The tart and uniform electroplated corundum particles enable faster and efficient grinding. Functionality】With the ability to grind deeper into the inner gaps of workpieces, this tool allows for intricate and precise grinding. It is suitable for use on materials such as jade, gemstones, and agate. Fine Sand Abrasive】Featuring fine sand abrasive, this grinding needle provides a and fast grinding experience. It ensures smooth and polished finishes on your desired workpiece. User-Friendly Design】Easy to use, simply attach the grinding needle to a punching machine and it is ready for operation. Its lightweight design and ergonomic handle offer ease and comfort during use.