Diamond Core Drill Bits Set - Lekomesh Tile Hole Saw Kit ?SIZE?11pcs in total: 1/4"(6mm),5/16"(8mm),3/8"(10mm),1"(25mm),1-1/8"(28mm),1-1/4"(32mm),1-3/8"(35mm),1-3/4"(45mm),2"(50mm),2-1/2"(65mm) diamond tile drill bits. ?APPLICATION?Dry drilling for porcelain tile, granite, marble, stone, masonry, brick... Wet drilling/milling can prolong the service life. ?TECHNOLOGY?This tiling installation kit is made of high quality diamond and steel by vacuum brazed diamond technology. Provide very high efficiency, drilling faster, durable and sturdy. ?FEATURES?Fast and smooth drilling, long lifetime, less chipping. Recommended RPM: 2000-5000. The faster the speed, the longer the service life. Do not use impact mode. ?STORAGE?Portable bag included. For easy carry and storage and protect of the diamond tools.