[Diamond Diamond Drill Size] Dry Diamond Core Diamond Capment Size includes: 2PC-6mm, 1PC-8mm/10mm/12mm, and can drill 4 different diameter holes. [Dry drilling design] Vajrayana drill head wax -like lubricant can melt and cool cutting surface during the dry drilling process, and can also use water as an additional cooling agent to extend the life of the drill. [Wide application] Vajrayana stone saw set is widely used. You can use them for ceramic pot drilling, or it can also be used for different hard materials, such as , tiles, glass, marble, tiles, , etc. [1/4 hexagonal handle] The drill head is designed with a hexagonal handle, which is more suitable for electric drill chip. It is not easy to during work and improve work efficiency. [Friendly reminder] In order to improve the service life of the drill, it is recommended to open the small moon pressure groove on the items at a 45 -degree angle throughout the high speed, and then slowly stand the drill to 90 degrees Material: Metal colour: Black Package Contents: 5 x drill bits(6/6/8/10/12mm) Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.