Package Include-----Total 13pcs/set: 8pcs core drill bits 1/4''(6mm), 5/16''(8mm), 4/5''(20mm), 1-3/8''(35mm), 2''(50mm), 3''(75mm), 4''(100mm); 1pc 4/5''(20mm) finger milling bit; 1pc 2''(50mm) beveling chamfer bit; 1pc hex adapter; 1pc sds adapter; 1pc 4.5''(115mm) tile saw blade Application-----Suitable for dry/wet drilling Porcelain Ceramic Tile Marble Granite Artificial Stone Quartz, etc. Diamond core drill bits for drilling holes. Beveling chamfer bit and finger milling bit for shape, enlarge and round bevel existing holes. Hex and SDS adapter could change the connection of diamond bits. Saw blade suitable for cutting and grinding of porcelain tiles, etc High-quality Diamond-----High-quality base steel, high-quality diamond provides to improve the efficiency of hole drilling Vacuum Brazed Technology-----Vacuum brazed technology provides higher processing efficiency and longer working life. Dry or Wet use. Wet using will prolong the working life and get better drilling effect Recommended Machine-----5/8''-11 Thread Angle Grinder. Less than 100mm: Recommended speed 6000RPM, maximum speed 11000RPM. 100mm and above: Recommended speed 3000RPM, maximum speed 6000RPM. If you want to use electric drill or other machine, you can use hex or sds adapter in the package