MAGBIT 628.6816 MAG628 4-1/4-Inch Carbide Tipped Holesaw with 1-9/16-Inch Depth 1-3/4-Inch depth Tough 3/16-Inch thick back plate Deep gullet design for improved chip removal Cuts through 2-Inchx4-Inch in one easy pass Faster cutting and more holes per saw