Milwaukee 5/16" Glass and Tile Drill Bit features an exact start tip that creates clean holes with minimal bit walking, ensuring precision and ease during your projects. Crafted with sharpened carbide, this drill bit fast drilling performance, while its reinforced carbide head provides enhanced durability for long-lasting use. ly designed for drilling holes in glass and ceramic tile with drill-drivers, it delivers reliable results every time. Please note, this bit is not for use on porcelain tile. Model Number: 48-20-8983