Milwaukee 1/4" Diamond Max™ Bits - 2PK are designed to deliver up to 20 times longer life, providing cuts in porcelain and other tough materials. These Diamond Max™ Hole Saws feature higher-grade diamonds and superior retention for -in-class performance. With maximum wear resistance, they are built to handle the most demanding applications with ease. The improved diamond grit ensures faster cutting and quickly grips into the material, resulting in clean and effortless cuts. Experience more cutting with less clogging, making your work efficient and precise. Model Number: 49-56-0501