Feature:
1.This diamond coated core drill bit removes a complete circle from tile, marble, granite, ceramic or other materials and only needs water for lubrication. Scope of application: jade agate, emerald pearl shell, drill bit, crystal lettering, carving grinding head.
2.Excellent for making and accurate hole tile and marble.
3.Start your hole diagonally, make a round trace and then hold drill straight.Add water for coolant and drill slowly.

Specification:
Material:Metal,Diamond
Color:Silver
Shank Diameter: 2.3mm/0.09inch
Head Diameter: 1.5mm/0.059inch
Sand length: 6-8mm/0.24-0.31inch
Full length: 40mm/1.57inch
Dimension: 2.3x42mm/0.09x1.65inch(Dia x L)
WEIGHT(1 set):25g

Warm reminder: Drill bit generally need to be drill slowly on the stone when start to drill, wait for the stone to open hole and then drill hard. Like hard stones, or ice types, miscellaneous stone, agate, etc., the punch tools may not be durable. If it is used on hard stone, it is recommended to add emulsified oil to lubricate the Drill bit.

lubricating effect.
Instructions:It must be cooled with water. If dry drilling is performed, the diamond on the tool head will be graphitized due to overheating, which will quickly wear and scrap. Light pressure feed, diamond tools rely on grinding to process the workpiece, excessive force, grinding powder is not easy to eliminate , tools (especially small tools) are also easily damaged.

PACKAGE INCLUDE(1 SET):
20 x Diamond Coated Hole Drills