This diamond hole saw kit is crafted from diamond steel, with its surface treated by an anti-corrosion electroplating process. The thickened diamond coating on the top provides cutting strength, enabling high-precision and smooth cuts. Using water lubrication can effectively extend the tool's service life. The double suction cup design offers stronger suction. When in use, it is necessary to evacuate the air inside the suction cups as much as possible to ensure a firm adsorption, making it suitable for smooth surfaces such as tiles, glass, and marble.The operation process is simply divided into four steps: clean the surface and mark the drilling position, place the hole saw in the designated position and adjust the hole diameter, press the double suction cups and fix them by adjusting the positioning shaft wheel, and start the drilling operation under the condition of water lubrication. The kit includes 15 professional integrated steel diamond hole saws, 1 double suction cup ceramic tile locator, 1 screwdriver for cleaning the debris left in the hole saw, and 1 product manual. This kit is applicable to smooth surfaces such as ceramic tiles, ceramics, glass (non-tempered), marble, granite, and terrazzo.