20PCS Diamond Drill Bit For Glass Tile Ceramic Jewelry Agate Hole Drill Tool

Features: 20PCS 1mm Diamond Drill Bit for Glass Tile Ceramic Jewelry Agate Hole Drill Tool Specially designed for drilling holes on jewelry Ideal for ceramic jade agate glass amber etc High quality diamond powder sturdy and durable to use The speed of the drilling machine should be reached 2000RPM Can be cut a little on the top with a pliers to keep sharp if used for many times Attentions: Please be stable when drilling do NOT shake. Please keep adding cold water for cooling down when drilling. Please choose the machine with high speed (Min.20000 RPM) to work with this drill bits. Specifications: Diameter of Shank: approx. 0.6mm/1.3mm (Please Select) Color: Silver (As pictures show) Material: Diamond powder Quantity: 20PCS Package Contents: 20 * Lapidary Drill Bits 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.