100mm 4" inch  Diamond Coated Hole Saw Drill Bits for Stone Granite Marble Ceramic
Product Specification

Product Name:Diamond Hole Saw Core Drill Bit, Diamond core drill bit for glass ceramic tile marble stone rock.

Outside Diameter :100mm (Close to 4") 

Hex Shank diameter:10mm (3/8")
Total length: 2-9/16" (65mm)
Drill depth:30mm depth
Quantity:Only 1 Piece
Features:
Brand New & High Quality
Easy to use, Good Performance and long life
Excellent for making clean and accurate hole on stone, granite, marble, tile
Works better with a electric drill( Excluding in this item )
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
Just a friendly reminder: 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 will send out your order within 1-2 days after payment has been received and cleared.
We Can List Any Size( Hole Diameter from 6mm - 160mm) & Amount Of This Product