Check the listing for details. Diamond Gemstone Drill Bits for Jewelry Rock 30-60 mm Super-Thin Rim 0.7-1.0mm. Condition: New. Listed at 10.80 USD. 30-60 mm Lapidary Super-thin Diamond Coated Drill Bit Hole Saw 0.6mm Rim Save Materials for Jasper Glass Model: Diamond Hole Saw Drill Bit Type: Hole Cutter Quantity: 1 Piece Specifications External Diameter Internal Diameter Shank Diameter Rim Thickness Total Length Drilling depth 30mm (1-3/16 inch) 30mm 28.5 10 0.7 55 22 31mm 31mm 29.5 10 0.7 55 22 32mm (1-1/4 inch) 32mm 30.5 10 0.7 55 22 33mm (1-5/16 inch) 33mm 31.5 10 0.7 55 22 34mm (1-11/32 inch) 34mm 32.5 10 0.7 55 22 35mm (1-3/8 inch) 35mm 33 10 0.7 55 22 36mm (1-7/16 inch) 36mm 34.5 10 0.7 55 22 37mm (1-15/32 inch) 37 35.5 10 0.7 55 22 38mm (1-1/2 inch) 38mm 36.3 10 0.7 55 22 39mm (1-9/16 inch) 39 37.4 10 0.7 55 22 40mm (1-9/16 inch) 40mm 38.5 10 0.7 55 22 41mm (1-5/8 inch) 41 39.5 10 0.7 55 22 42mm (1-21/32 inch) 42mm 40.5 10 0.7 55 22 43mm (1-23/32 inch) 43 41.3 10 0.7 55 22 44mm (close to 1-3/4 inch) 44 42.3 10 0.7 55 22 45mm (1-3/4 inch) 45mm 43.5 10 0.7 55 22 46mm 46 44.3 10 0.7 55 22 47mm 47 45.5 10 0.7 55 22 48mm (1-7/8 inch) 48 46.5 10 0.7 55 22 49mm 49 47.5 10 0.7 55 22 50mm (close to 2 inch) 50 48.5 10 0.7 55 22 51mm 51 49 10 1.0 55 22 52mm 52 50 10 1.0 55 22 53mm (2-1/8 inch) 53 51 10 1.0 55 22 54mm 54 52 10 1.0 55 22 55mm (2-11/64 inch) 55 53 10 1.0 55 22 56mm 56 54 10 1.0 55 22 57mm 57 55 10 1.0 55 22 58mm(2-5/16 inch) 58 56 10 1.0 55 22 59mm 59 57 10 1.0 55 22 60mm (2-3/8 inch) 60mm 58 10 1.0 55 22 Product Description 1.The super-thin Electroplated diamond drill bits are one of the finest drill bit manufactured for Hobby, Lapidary, Glass applications. 2.This diamond drill bit will perform well on drilling just about any kind of rock From the very soft Petoskey Stone fossils to hard jasper and agate, and so on precious materials.Especially suitable for use on hard lapidary materials like agate, jasper, petrified wood and geodes. 3.Apply to drilling the ceramics and glass widely For example: the glass of watch, optical glass, super-thin glass, architecture glass, automobile glass, LCD glass, quartz glass etc. Product advantages Diamond drill bit very thin, can reduce material consumption maximize: The thickness of the drill bit’s rim is only 0.6mm, the material of Processed aren’t damaged during drilling process, save material for high value jade, agate, jasper, petrified wood and geodes. A very good cost effective option for those that want very thin kerfs. Hole drilling high precision: The rim of drill bits are very smooth and thin to meet the most exacting faceting requirements. Neat, smooth, no broken edge. High drilling efficiency: Sharp, improve the drilling speed, Drill a Holes In Seconds Long service life: Super-thin drill bits are made of high quality fine diamond particles, it’s more durable than common diamond bit! Drilling hole after a period of time, We recommend that you using the drill bit to drill white corundum grinding wheel for several times, the diamond particles on the front end of the drill will appear again, and then you can continue to use the drill bit. Quick Tips 1. Water or coolant must always be used to cool and lubricate the tip. 2. The bit is suitable for use in bench drill, electric drill or rotary tool, recommended to be used in bench drill. 3. Never use drills while machine is in hammer action. We Can List Any Size & Amount Of This Product: Hole Diameter from 3mm - 100mm Regular Air postage from China to Worldwide and takes 15-25 days delivery to your home We will send out your order within 1-2 days after payment has been received and cleared.