JINGLING 6.5mm Diamond Hole Saws, 1/4" Glass Hole Saw Drill Bits, Masonry Drilling Tools for Stone Rocks Tile Ceramic Pack of 20Pcs

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

• Diamond tipped drill bit is made of carbon steel and high quality diamond powdert, make the ceramic tile drill bits particularly sturdy, sharp
• Easy to use, excellent for making clean and accurate hole on stone, glass, tile, ceramic, granite, marble
• Outer Diameter: 6.5mm(1/4 inch); Inner Diameter: 4mm(5/32"); Drill Depth: 23mm(7/8"); Quantity: 20Pcs
• Shank diameter 6 mm(close to 1/4") will fit cordless screwdrivers, hand electric drill with standard drill chuck
• Holes require no ruther work as cutting is clean; Start drill at 45 degree to surface and align to 90 degree as hole forms