1. This coated drill bit removes a complete circle from glass, tiles, marble, granite, ceramic. 2. Can be used with a standard electric drill. 3. Easy to use,good performance, long life. 4. Excellent for making neat and accurate hole on ceramic, porcelain tiles, glass, marble, granite,etc. 5. This glass hole opener drill is made of sturdy material, which is more durable and sturdy. Spec: Features: This coated drill bit removes a complete circle from glass, tiles, marble, granite, ceramic. Can be used with a standard electric drill. Easy to use,good performance, long life. Excellent for making neat and accurate hole on ceramic, porcelain tiles, glass, marble, granite,etc. This glass hole opener drill is made of sturdy material, which is more durable and sturdy. Package includes: 1 x 10pcs Coated Hole Saw Drill BitsThis glass hole opener drill is made of sturdy material, which is and sturdy. Summary Of Selling Points: easy to operate, description of selling points humanized design, making the tool easy to pinch and hold, and can quickly open holes without complicated steps, greatly improving work efficiency. Easy to use,good performance, life. for making and accurate hole on ceramic, porcelain tiles, glass, marble, granite,etc. This coated drill bit removes a circle from glass, tiles, marble, granite, ceramic.