ILOVETOOL 31mm Super-Thin Diamond Tip Drill Bit for Jewelry Gemstone Pack of 3Pcs

3Pcs 31mm Lapidary Ultra-thin Diamond Coated Drill Bit Hole Saw 0.6 mm Rim Save Materials for Jasper Item specifics Model: Diamond Hole Saw Drill Bit Type: Hole Cutter Rim Thickness: only 0.6 mm ( 0.0236" ) Quantity: One Packet is 3 Pcs Specifications External Diameter:31mm Internal Diameter:29.5-30mm Rim Thickness:0.6-0.8mm Shank Diameter:8.3-8.5mm Shank Length:23mm Total Length:53mm Drilling depth:22mm Product Description 1. This diamond drill bit will perform well on any kind of rock. 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: Hole drilling high precision: neat, smooth, no broken edge. High drilling efficiency: Sharp, improve the drilling speed, Drill a Holes 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 )

• Product Name:Drill Bits for Jewelry Making, Bits Jewelry, Jewelry Drilling Tools.
• External Diameter:31mm, Internal Diameter:29.5-30mm, Rim Thickness:0.6-0.8mm,Quantity: Only 3Pcs.
• Shank Diameter:8.3-8.5mm, Shank Length:23mm, Total Length:53mm, Drilling depth:22mm.
• 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 agate, jasper, petrified wood and geodes.
• 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! Hole drilling high precision: neat, smooth, no broken edge. High drilling efficiency: Sharp, improve the drilling speed, Drill a Holes In Seconds.