Check the listing for details. 20Pcs Diamond Drill Bits 2.5mm Hole Saw Tip Drill Holes for Stone Glass Jewelry. Condition: New. Listed at 14.80 USD. 20Pcs 2.5mm 3/32" Diamond Coated Tool Hole Saw Drill Bits For Glass Tile Ceramic Granite The 2.5mm diamond coated hole saw suitable for use in drill hole on glass, marble, tile or granite. Product Description: Outside Diameter : 2.5mm ( close to 3/32" ) Total length :42mm (1-21/32"), Drill depth : only 3mm depth The hole of drill bit is not right through the shaft, hole depth approximately 3 mm Shank diameter: 2.5mm ( close to 3/32") Quantity:Total 20 Pcs Drilling speed: Drill a Holes In Seconds Use with water as a lubricant 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 We Can List Any Size & Amount Of This Product: Hole diameter from 1mm to 230mm We will send out your order within 1-2 days after payment has been received and cleared. Welcome to Visit My eBay Store: Jewelry Tools 1