JINGLING 20Pcs 1/4" inch 6.5mm Diamond Coated Hole Saw Drill Bits for Stone Granite Marble Ceramic
Product Specification
Product Name: 1/4 in Diamond tip masonry bit, 6.5mm Stone cutting bits, Granite hole bit, Drill bits for rocks
Outer/Hole diameter : 6.5mm (1/4")
Inner diameter: 4mm (5/32")
Shank diameter: 6mm (Smaller than 1/4")
Total length: 55mm (2.2")
Drilling depth: 23mm (7/8")
Quantity: 20Pcs
Use: Masonry Drilling
Material: Diamond, steel
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 )
Diamond drill set with 6 mm shank that will fit cordless screwdrivers, drills etc or use in standard drill chuck
Drilling speed: Drill a hole in seconds
Use with water as a lubricant
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
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( hole diameter from 4mm - 200mm) & amount of this product
How to use a hand drill to drill holes in the stone/tile/glass?
Step 1. The bit on the stone/tile/glass 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 stone/tile/glass finally, the technique requires a "wobble" of the drill rather that steady pressure straight on