Diamond Hole Saw Set perfect for drilling holes on ceramic, tile, blocks, marble, granite, such hard materials Diamond Hole Saw SetSize: 19mm/25mm/30mm/35mm/41mmDiamond Grit: 60#Applications: perfect for drilling holes on ceramic, tile, blocks, marble, granite, such hard materials.We use top quality materials to ensure high efficiency and long working life.The plastic package is eco-friendly