Feature:1. Good Heat Dissipation: These drill bits have wax inside to absorb and dissipate heat for faster and cooler drilling performance2. Good Performance: The drill bits are designed with M14 female thread and slip proof handle, feature large torsion and high bearing capacity, suitable for marble, glass, tiles, etc.3. Long Service Life: The drill bits are uniformly coated with thickened emery, which improve wear resistance and service life, has stable performance4. Stable and Durable Material: The hole saw adopts fine natural diamond powder, the cutting blade is made of excellent diamond, which has more effective performance than traditional carbide or bimetal hole saws5. Equipped with Aluminum Box: The drill bit set equipped with high end aluminum box for storage, which provides good rust and corrosion resistantSpecification:Item Type: Diamond Drill BitsMaterial: DiamondColor: BlackAperture: Approx.6mm/0.2in, 6mm/0.2in, 8mm/0.3in, 8mm/0.3in, 10mm/0.4in, 12mm/0.5in, 14mm/0.6inHead Height: Approx.15mm/0.6inWorking Length: Approx.35mm/1.4inOverall Length: Approx.60mm/2.4inFemale Thread: M14.Package List:7 x Diamond Drill Bit1 x Saw Blade1 x Aluminum Box1 x ManualNote:1. Do not use these drills with hammer mode.2. Install these bits on a corded drill, not a cordless drill (doesn't have enough power).3. Only for tile drilling, not recommended for materials behind tiles.4. For horizontal drilling, just apply light pressure.5. For vertical drilling, the weight of the machine will provide enough pressure.6. Finger drills are used to enlarge, reshape or round the bevel of existing holes.7. Please wear all applicable safety gear when using these diamond bits.