The 11pcs/box Diamond Hole Saw Kit by Shdiatool is a versatile set designed specifically for drilling holes in porcelain, marble tiles, and more. Made of steel and diamond, these drill bits range in diameter from 6mm to 65mm, with a total depth of 10mm to 43mm. Suitable for use with an angle grinder or drill, this set is perfect for cutting, grinding, and sanding tasks in your workshop. With a blue color and a durable construction, this kit is a reliable and efficient tool for various home and garden projects.