JINGLING 4mm 5/32"inch Diamond Hole Saw Core Boring Drill Bits Masonry Tools for Glass Tile Stone Pack of 20Pcs

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About this product

20Pcs 4mm 5/32" Diamond Coated Hole Saw Drill Bits For Glass Tile Ceramic Granite The diamond coated hole saw suitable for use in drill hole on glass, marble, tile or granite. Hole Diameter : 4mm (close to 5/32") Total length : 50mm (2") Drill depth: 10mm depth Shank diameter: 3.5mm Quantity: Total 20 Pcs Drilling speed: Drill a hole 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 Please add the water to cool the drill bit while drilling hole process The Diamond Hole Saw Does NOT Have Center Pilot Drill There is no need for a Pilot Drill Bit, because pilots are not safe for glass/stone. How to use a hand drill to drill holes in the glass/tile/stone? Step 1. The bit on the glass/tile/stone 45 degree, open a half-moon notch on it Step 2. Slowly up the bit to 60 degrees, and then gently drill Step 3. Reached 90 degrees, continue to drill Step 4. Drill through the glass/tile/stone finally, the technique requires a “wobble” of the drill rather that steady pressure straight on We Can List Any Size and Amount Of This Product: Hole diameter from 0.4mm to 230mm We will send out your order within 1-2 days after payment has been received and cleared