EXFEIN Diamond Core Drill Bits - 2pcs 1/4" Tile Hole Saw for Porcelain Tile Ceramic Marble Granite

EXFEIN Diamond Core Drill Bits - 2pcs 1/4" Tile Hole Saw for Porcelain Tile Ceramic Marble Granite

【Size】Diameter 1/4"(6mm); Total length 2-3/8"(60mm); Diamond height 3/8"(10mm); Working depth 1-3/4"(45mm); 5/8"-11 Thread; Recommended RPM 6000, Max RPM 11000. 【Application】EXFEIN core drill bits are used to drilling 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, you need an adapter 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.