9-piece hard alloy tile hole opener set includes alloy hole openers in sizes 22mm, 28mm, 35mm, 44mm, 68mm, and 73mm, plus a large connecting rod, a small connecting rod, and a wrench. This broad size range lets you drill different tile holes without swapping tools. Multi-purpose emery sand is included to smooth drilling, helping achieve precise holes and reducing tile damage. Wide range of applications: suitable for glass, tiles, floor tiles, and marble, meeting different drilling needs in home improvement projects. Fast and enduring performance: designed for fast drilling and long-lasting durability; handles heavy use and efficient debris removal for cleaner holes. Practical use scenarios: - Install towel bars or curtain rods through tiled walls. - Mount electrical outlets, switches, or plumbing through tiles. - Create cable or passage holes in marble countertops or floor tiles.