JINGLING 1.4mm Diamond Lapidary Drill Bits Micro Solid Bit Tipped Jewelry Tools for Stone Rock Pack of 20Pcs

• 1.4mm Lapidary diamond coated drill bit is made of high-quality diamond powder electroplating, sharp, with high accuracy and long service life
• Suitable for use in drill hole on the jewelry, gemstone, jade, agate, amber, beeswax, crystal
• Head Diameter: 1.4-1.6mm; Total length: 43mm; Shank diameter: 0.8mm
• Suitable Machine:high speed bench drill(Speed above 10000RPM);Suitable for dremel with Universal 3-jaw chuck
• Use with water as a lubricant;The rod of the jewelry drill bits can be cut short as needed to reduce wobble when drilling

JINGLING 20Pcs 1.4mm Diamond Coated Lapidary Drill Bits Solid Hole Saw Jewelry Tools for Gemstone Code 4# Product Description: Product Name: Lapidary Diamond Drill Bits, Diamond Drill Bits for Glass Stone, Diamond Bits for Drill Jewelry Head Diameter: 1.4 mm Total length: 43mm Shank diameter: 0.8 mm Quantity: 20Pcs Drilling speed: Drill a hole in seconds Reduce Wobble: The rod of the drill bit can be cut short as needed to reduce wobble when drilling Use with water as a lubricant Must drop water or put the stones in the water, during drilling hole operation Recommend Speed:18000-50000 RPM The higher the speed of machine, the effect of drilling hole is better Application: suitable for use in drill hole on the jewelry, gems, jade, agate, amber, beeswax, crystal Suitable Machine: high speed bench drill, bench drill, fixed drilling machine, etc. Note: The drilling hole needles are producted from factory directily, there is rust on needle's handle, but not influence use Quick Tips 1. During drilling operation, with machines can't use more than 1 kg of strength to press the needle, because the diameter of handle is very small, too big power will broken needle 2. Suggest you use the machine to drilling hole, just like the chicken peck rice, drilling hole after a few seconds, lift up once, and then press the continue to drill We Can List Any Size (Head Diameter 1.0mm/1.2mm/1.4mm/1.6mm/1.8mm/2.0mm/2.2mm ) & amount of this product Just a friendly reminder: The Shank diameter of drill bit is only 0.6mm (close to 0.024") There are two different collet sizes for Dremel: 3mm (1/8") or Universal 3-jaw chuck If your chuck of Dremel (models 4300-8050) has an Universal 3-jaw chuck, then the grinding bit can be installed directly However, it is NOT suitable for dremel with 3mm 1/8" chuck (such as:models 3000,4000) If your chuck of Dremel is 3mm (1/8"), maybe you need add the Universal 3-jaw chuck for Dremel