As a responsible seller, our goal is to provide customers with the highest quality products and services. We are honored that you can experience our products, and we will provide you with the highest quality service. Specification : Color : Blue Diamond Drill Size : 1/4 IN, 5/16 IN, 3/8 IN, 1/2 IN, Length 2.56 IN Cross Drill Size : 0.24*3 IN Weight : 98g /3.45OZ Product Features and Advantages : ·The diamond drill bits set ensures clean and precise holes in fragile materials such as ceramic, glass, porcelain, marble, reducing the risk of cracking or damage ·The ceramic drill bits with solid cooling wax, which can effectively reduce cutting temperature without adding water ·The tile drill bits uses high-quality materials, is durable, has precise and efficient drilling ·The fast dry drilling with round shank compatible with most machines such as power drills, hand drills and bench drills ·The dry diamond drill bits set comes in multiple sizes to meet your different drilling needs Packaging information: 2PC 1/4 inch Diamond Drill 1PC 5/16 inch Diamond Drill 1PC 3/8 inch Diamond Drill 1PC 1/2 inch Diamond Drill 2PC 4-Edge Cross Drill 1PC Storage Bag Our Promise: If you are not satisfied with our diamond drill bits set, please contact us as soon as possible. We will assist you in resolving any product issues within 12 hours. Every tile drill bits we sell has undergone strict quality inspection. If you want to buy our drill bits for ceramic, please don't hesitate to add them to the shopping cart and buy. Finally, I wish you have a good day.