General description High quality diamond powder lapidary drill bits, precise and durable. Ideal for drilling holes in materials such as jewelry, ceramics, jade, agate, glass, amber, and semiconductors. Technical specifications Size: 2-2.1mm Quantity: 20 pieces per pack Usage The higher the speed of the drilling machine, the better the effect of the drill bits. Recommended speed: 2000 rpm for optimal performance. Use cold water during the drilling operation to enhance effectiveness. For prolonged use, if the drill bit becomes dull, you can cut the top slightly with pliers to restore sharpness.
Availablity: 3-5 days
Free shipping & return for orders over $200