Superior Diamond Tip Drill Bits: This superior diamond drill bit is made from stainless steel and coated with diamond particles to create a stronger, more efficient drill head and for working with a wide range of delicate materials.Diamond coating up to 10 mm: This diamond drill bit has a diamond coating up to 10mm, which makes it sharper than ordinary drill bits when drilling, and the drilled hole is smoother, especially suitable for fine work on porcelain tiles, glass and metal. ceramic.Wax core for heat dissipation: Unlike standard diamond tipped drill bits used for ceramic and glass which require water or lubricant to keep them cool, our core Built-in wax can automatically absorb and dissipate heat.Widely application: This diamond drill bit is perfect for drilling granite and marble, masonry, concrete, tiles or ceramics, hard plastic. Size:4pcs Diamond Drill BitsDiamond Point Drill Bits Ideal for Porcelain Tile, Granite, Marble, Stone, Masonry , brick, etc.Feature:Material: stainless steel and diamond coating Shaft: 6 mmDiamond coating up to 10 mmSize: 6mm, 8mm, 10mm, 12mmPackage:4pcs vacuum brazed diamond drill bitWarm tips:Instructions for use for vacuum brazed diamond bits 1.Do not use these bits with hammer mode2. only install these drill bits on corded drill, not cordless drill (not enough power)3.Only for tile drilling, not recommended for material behind tilep>4.For horizontal drilling, just give light pressure, for vertical drilling, the weight of the machine will give enough pressureStart drilling according to the following instructions:1) Place the drill at a 45 degree angle2) Drill until the hole begins to form3) Bring the drill into position vertical4) Continue drilling and swinging the machine along a circle