Precision Cutting: Diamond coated tip allows for smooth, accurate cuts through tile, stone, glass and other hard materials up to 1 3/8" depth Work with a lot water. 3 1/8" Diamond Hole Saw with Triple-Layer Diamond Coating for Enhanced Performance Fast Drilling: Sharp diamond grit rapidly cuts through even the hard surfaces for quick, mess-free hole creation Versatile Usage: Suitable for drilling holes in ceramic, porcelain, granite, marble, glass and other stone/tile surfaces for plumbing, electrical and more Includes Pilot Bit: 3 1/8" (80mm) hole saw comes with matching pilot drill bit to easily start holes and keep the saw cutting on the marked line for clean, accurate results This heavy-duty diamond hole saw from DaduoRi makes quick work of cutting holes through tough materials like ceramic tile, granite, glass and stone. The durable diamond-coated cutting edge stays sharp for long-lasting performance, drilling holes with clean, precise edges with each use. The convenient pilot drill bit centers and stabilizes the hole saw for accurate cuts every time. At 3 1/8 inches in diameter, it's ideal for tasks like installing new faucets, surface-mounted lighting or electrical outlets. With a maximum cutting depth of 1 3/8 inches, this hole saw can drill through surfaces that other tools might struggle with.