Diamond Coated Drill Bits Set

[5 Different Sizes] This diamonds drill bits set contains 15 sizes of 6/8/10/12/14/16/18/20/22/25/26/28/30/40/50 mm. It can be used for glass, tile bottles, block jars, fiberglass tile ceramic, slate marble, granite Lightweight stone drilling.
[Sturdy Material] This product is made of iron and diamond material cured by special strengthening electroplating. It is plated with diamond dust coating, which is very sturdy and durable to use.
[High Efficiency] The diamonds drill bits have neat opening without damaged edge. It has small incision resistance and can enhance the drilling speed.
[Easy to Use] This product is simple to operate. Water is required for lubrication when drilling. The package includes 15 tile hole cutter set, sufficient to use.
[After-sales] If you have any questions, please get in touch with us, our service team will provide you with a professional and satisfactory service.