Check the listing for details. 11Pcs 3-14mm Super-Thin Diamond Drill Bits Hole Saw Lapidary Tools for Gem Stone. Color: Silver, Condition: New. Listed at 19.99 USD. JINGLING 11Pcs 3 4 5 6 7 8 9 10 11 12 14mm Kit Lapidary Super-thin Diamond Drill Bit Hole Saw 0.5-0.6mm Rim Produce Name: Gemstone Drill Bits, Jewelry Drill Bits Rim Thickness: only 0.5-0.6mm Quantity: Total 11Pcs, include as below: PS: With a little deviation measurement data belong to the normal phenomenon, the data are for reference only Product Description 1. This diamond drill bit will perform well on any kind of rock It has held up extremely well and drilling just about any kind of rock, from the very soft Petoskey Stone fossils to hard jasper and agate of precious materials Especially suitable for use on hard lapidary materials like jasper, petrified wood and geodes. 2. Apply to drilling the glass of watch, optical glass and super-thin glass; 3. Used in ceramics and glass (architecture glass, automobile glass, LCD glass, quartz glass, ultra-thin glass, etc) widely. 4. Water or coolant must always be used to cool and lubricate the tip. Product performance and advantages: Good Performance and long life: Super-thin drill bits are made of high quality fine diamond plating, it's more durable than common diamond bit! The super-thin coated diamond drill bits are one of the finest drill bit manufactured for Hobby, Lapidary, Glass applications. The items are very smooth and thin to meet the most exacting faceting requirements. They can offers a very good cost effective option for those that want very thin kerfs. Diamond drill bit very thin, save material: The front part of the drill bit’s thickness is only 0.5-0.6 mm, the material of Processed aren’t damaged during drilling process, can reduce material consumption maximize, especially suitable for high value jade, agate, jasper, petrified wood and geodes. Hole drilling high precision: neat, smooth, no broken edge. High drilling efficiency: Sharp, improve the drilling speed, Drill a hole in seconds Quick Tips 1. Please add water for coolant and drill slowly 2. Start drill at 45 Degree to surface and align to 90 Degree as hole forms 3. Never use drills while machine is in hammer action. 4. Holes Require No Futher Work As Cutting Is Clean 5. Just fill with ordinary electric drill or rotary tool, Works better with a electric drill ( Excluding in this item ) We will send out your order within 1-2 days after payment has been received and cleared. Please let us know if you are looking for other accessories or hardware. We Can List Any Size & Amount Of This Product: Hole Diameter from 3mm - 100mm