Mgtgbao Dry Diamond Drill Bits :2pc 3/16” (5mm), 2pc 1/4” (6mm), 1pc 5/16” (8mm) , 1pc 3/8” (10mm), 1pc 1/2” (12mm), 9/16” (14mm) with Hex Shank for Porcelain Tile Ceramic Marble

Feature:
Multi-purpose drilling for granite & marble, masonry, concrete, tile/ceramic, stone
Wax inside for cooling,our Diamond Tipped Drill Bits have wax cores built-in which automatically absorb and dissipate heat as you go
Dry drilling and Use water for longer time.Notice:Please use with water when drilling granite
Vacuum Brazed diamond technology provide very high efficiency,cuts faster and lasts longer
Size: 3/16” (5mm), 1pc 1/4” (6mm), 1pc 5/16” (8mm) , 1pc 3/8” (10mm), 1pc 1/2” (12mm) , 9/16” (14mm)
Quality:8pcs
Color:green
Lengthen 3/16 ,1/4 (:65mm) and other sizes (80mm)

Package includes:
2pc 3/16 inch (5mm) diamond drill bits diameter
2pc 1/4 inch (6mm) diamond drill bits diameter
1pc 5/16 inch (8mm) diamond drill bits diameter
1pc 3/8 inch (10mm) diamond drill bits diameter
1pc 1/2 inch (12mm) diamond drill bits diameter
1pc 9/16 inch (14mm) diamond drill bits diameter
1 x Gray Storage bottle

Using Steps:
Step 1: Start Drilling the hole in an angle about 45 degrees to the surface, so the drill has the chance to start and will prevent the drill slipping
Step 2: Slowly move the drill bit into a more up-right position and wobble the drill bit in the circular motion
Step 3: Do not need to apply much pressure, let the drill bit do the work, you will feel the drill bit break through the back of the glass or tile once the hole is completed
Step 4: Take care when using them as a bit can glaze and burn out if use too fast