Usage Tips:10 Pcs. Glass Drill Bit 6 Mm Round With Shank f74 10 pcs glass drill bit 6 mm round with shank Specification: Material: Hard alloy Hex shank diameter: 4.76mm (3/16") Delivery Quantity: 10 pieces Product color: red Product size: 6MM Note: manual measurement, please allow 1-3cm error Note: 1, In order to improve the service life of the tile and glass drilling machine, it is better to add some coolant such as water kerosene or turpentine during drilling. Low speed and low pressure. 2, It is important to work carefully, wearing gloves and safety glasses to ensure you are not damaged by glass shards. Lubricate the drilling process with fluid to prevent the bit from overheating. glass drill bit set - durable and essential for home improvement Bits are made of alloy and have well-built tungsten carbide tips. Small tip shaped spade made of super hard tungsten carbide which is extremely durable and resists friction when drilling glass. Drill bits are cutting tools used to remove material to create holes, almost always circular in cross section. Tile drill bit- high durability Strong and durable carbide head for use on hard-to-break or penetrate surfaces. Low cut resistance, and durability. glass and tile drill bits - Attach drill bits to any compatible drill to create holes that drive them to cut or drill through the heaviest workpiece, typically by rotating. - Drills are suitable for p primarily for glass, ceramics, tiles and other hard and brittle work surfaces, suitable for accurate centering drilling, do not damage porcelain.