Features 1、APPLICABLE MATERIAL: These hole saws are suitable for dry and wet drilling, used for drilling ceramic tiles, granite, marble, bricks, and other similar materials. 2、EXCELLENT STEEL: These hole saws are made of excellent 45 steel, with vacuum brazed diamond processing, high hardness and impact resistance. 3、MAIN PURPOSE: Mainly used to expand, shape, or chamfer existing holes in stone, with fast drilling speed, high efficiency, and a wide range of applications. 4、SPECIFICATIONS: This kit includes 8 pieces different hole saws, 6mm 8mm 20mm 35mm 40mm 45mm 50mm and 68mm, to meet different drilling needs. 5、EASY INSTALLATION: Equipped with a converter, with M14 drill bit shank, these diamond hole saws can be stably installed on the angle grinder for use. Specification Item Type: Hole Saw Set Material: 45 Steel Drill Bit Shank : M14 Drilling Diameter: 6mm / 0.24in 8mm / 0.3in 20mm / 0.8in 35mm / 1.4in 40mm / 1.6in 45mm / 1.8in 50mm / 2in 68mm / 2.7in Applicable Machine: Angle Grinder Package List 8 x Hole Saws 1 x Converter 1 x Storage Box