10Pcs Diamond Coated Spiral Drill Bits Drilling Polishing For Glass Jewelryagate

Features: *Caution High-speed (more than 20 000 rpm) Light pressure Please add some water when drill a hole. *Micro diamond jade drill bit drilling tool this product is made of spiral drill and diamond powder. Suitable for drilling of jewelry ceramics glass and semiconductor materials. *The drill bit made from HSS spiral drill bit and diamond coated. *The flute is spiral groove design for easy chip removal and improved drilling efficiency *With round shank fit hand electric drills cordless drills bench drill and hanging mill etc. *Suitable for jewelry jade metal Agate Jade glass stone gemstones pearls pendants Cobblestone. Specifications: Product name: Diamond Coated Spiral Drill Bits Material: Emery + high speed steel spiral drill Color: Sivler Optional Size: 0.8mm 1mm 1.2mm 1.5mm 1.8mm 2mm 2.5mm 3mm Suitable for: Drilling Polishing Jewelry jade metal Agate Jade glass stone gemstones pearls pendants Cobblestone. Quantity: 10Pcs Package Contents: 10 × Drill Bits Note: 1.Transition: 1cm=10mm=0.39inch. 2. 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. 3. Please allow slight manual measurement deviation for the data.