【Specification】12pcs/set. This set contains 6pcs diamond core drill bits(6/8/10/35/50/65mm); 1pc 1" diamond core drill bit finger bit all in one; 1pc 3/8" diamond finger bit; 1pc 2" diamond chamfer bit; 1pc connect 5/8"-11 thread to hex adapter; 2pcs diamond blade for tile. 【Application】EXFEIN core drill bits are used to drilling holes; finger bit for enlarging holes; chamfer bit for trimming holes; For porcelain ceramic tile marble granite, etc. Dry or wet use. Wet drilling with less debris for longer life. 【Machine】5/8" arbor angle grinder. If you are using this bit on a hand drill, use the hex adapter in this set and make sure that the drilling speed does not go below 2000RPM. And do not use the impact drill mode. 【Durability】Vacuum Brazed technology combines a high-quality steel matrix with diamonds in a scientific ratio and provides high efficient working performance and longer service life. 【Fast drilling】Lightning teeth has wide chip removal slots, dust can be quickly discharged when drilling, not easy to be clogged. EXFEIN Diamond Tile Hole Saw Kit 12pcs - 6/8/10/25/35/50/65mm Core Drill Bits,10mm Milling Bit and 2" Diamond Chamfer Bit with Hex Adapter and 4.5" 2pcs Diamond Blade and for Tile Porcelain Marble