15-Piece Coated Core Drill Bit Set, 6-50mm Hole Saw with Water Lubrication for Glass, Ceramic and Marble Tiles

[IMPORTANT LUBRICATION REQUIREMENT] To prevent the core drill from burning out and to prolong its life, always use water as a lubricant during operation. Water helps cool the drill bit, reduce friction, and remove debris, resulting in a smoother finish. Neglecting to use water can cause the drill to overheat and be damaged. Following this simple step ensures optimal performance and protects your drill. [VERSATILE DRILLING PERFORMANCE] This coated core drill bit set is designed to cut complete, clean circles through a wide range of hard materials, including glass tile, marble, granite, ceramic, and porcelain. It requires only water for lubrication to ensure smooth operation and prevent overheating. Whether you're a professional contractor or a DIY enthusiast, this set delivers accurate holes for projects. [FULL RANGE OF SIZES] The set includes 15 different hole saw sizes from 6 mm to 50 mm, covering 6 mm, 8 mm, 10 mm, 12 mm, 14 mm, 16 mm, 18 mm, 20 mm, 22 mm, 25 mm, 26 mm, 28 mm, 30 mm, 40 mm, and 50 mm. This variety allows you to handle projects of any size, from small, intricate tasks like drilling glass to larger applications such as installing pipes in marble countertops. Each size is clearly marked for easy identification. [MATERIAL AND DURABILITY] Made from metal with a specialized coating, these drill bits offer exceptional hardness and wear resistance. The coating ensures the cutting edge stays sharp longer, allowing you to drill through tough surfaces repeatedly without loss of performance. This construction reduces the need for frequent replacements, saving you time and money on your drilling tasks and providing easy use. [EASY TO USE AND] Using these Core drilling is simple and user-friendly. For best results, start your hole at a diagonal angle to create a round bore, then gradually hold the drill bit straight. This prevents the bit from moving and ensures a clean, precise cut. The drill bits are compatible with standard electric drills, making them easy to integrate into your existing tool collection without the need for any special equipment.