Features FAST AND EFFICIENT: Diamond hole saws with high diamond exposure rates ensure faster and more aggressive drilling DURABLE TECHNOLOGY: the vacuum soldering technology provides a longer service life than electroplating technology, very practical EXCELLENT PERFORMANCE: Brazed diamond drill bits have less crumbs, less breakage, less heat and a good finish Durable diamonds: made of excellent diamond material, durable, with high hardness, high melting point, high insulation and chemical stability Wide range of applications: the vacuum brazed diamond drill bit is widely used for drilling tiles, ceramics, granite, marble, etc., and is useful and practical Specification: Item Type:Brazed Diamond Drill Bit Material: Diamond Colour: black. Specifications: 2pcs x 6mm, 2pcs x 8mm, 10, 12, 14mm, 1pcs each Size: approx. 6 mm/0.24 inches, 8 mm/0.31 inches, 10 mm/0.39 inches, 12 mm/0.47 inches, 14 mm/0.55 inches. Usage Widely used in drilling tile, ceramic, granite, marble, etc. Package list: 7 x solder hole opener, 1 x extension rod, 1 x storage box Package List 7 x Brazing Hole Opener 1 x Extension Rod 1 x Storage Box