Gasea 15Pcs Diamond Drill Bit Set, Hole Saw Drill Bits Tools Diamond Hollow Core Cutter for Glass Tile Ceramic Marble Porcelain (φ6-50mm)

• 15 Sizes Diamond Drill Bits – Complete diamond drill bits set with 15 sizes: 6mm, 8mm, 10mm, 12mm, 14mm, 16mm, 18mm, 20mm, 22mm, 25mm, 28mm, 30mm, 35mm, 40mm, 50mm, meeting different drilling needs.
• Smooth & Precise Cutting – Designed for clean drilling, the diamond core drill bits create neat, smooth openings without broken edges or vibration when used correctly.
• Compatible with Power Tools – Works with all standard electric drills and impact drills; for best results, use reduced speed, light pressure, and water lubrication to extend tool life.
• Wide Application – These diamond hole saw cutters are suitable for drilling glass, ceramic tiles, porcelain, marble, granite, stone slabs, and even glass bottles.
• Important Usage Note – Always use water for cooling when using these diamond drill bits for tile and glass; not suitable for concrete or drilling deeper than 1/2 inch.

√ Feature: Made of high quality metal material, very durable. 15 different diameters, perfectly meet you need. Opening neat, smooth, no broken edges, will not produce tremor. Needs water for lubrication, otherwise the diamond core drill will burn. Can be used with a standard electric drill. Appliacation: Can be used for drill hole on glass, marble, tile or granite. √ How to Use Diamond Drill Bits Drill Correctly ●Step1:Use pen to mark start of hole，and keep wet with WATER or COOLANT. ●Step2:Angle drill 45 degrees to start hole, and being drilling at low speeds. Angle drill to vertical position once the hole has started. ●Step3:Minimum pressure.Slow speed down for exit hole or drill from the other side to prevent breakthrough. √ Note: If you smell burning, back off! Either your speed is too high or the pressure you're applying is too much. You're drill bit should never be hot to the touch, not even warm. - Slowest speed - Coolant (Water) - Minimum pressure √ Package Included: 15 x Diamond Hole Saw