How do I drill a hole into slate. At 365-Drills we show how to drill a slate tile. Using PORSADRILL diamond tile drill bits a slate based tile or floor can be drilled with our diamond holesaws. A diamond holesaw is the best device for drilling holes into stone based material like slate but also for porcelain tiles, granite worktops, ceramic tiles, bathrooms kitchens. If you need to drill a hole into stone then 365Drills can let you do this with PORSADRILL.