Step 3 · Unscrew the Old Drain Flange
This is often the most challenging part of the job. Insert your drain removal tool, such as a drain key, into the drain opening. Ensure the tool's prongs fit securely into the crossbars of the flange. To gain leverage, slide the long handle of a pair of pliers or the shaft of a large screwdriver through the hole(s) at the top of the drain removal tool, creating a T-handle. Apply firm, steady downward pressure while turning the handle counter-clockwise. You may feel a 'pop' as the old putty seal breaks. Continue turning until the old drain flange is completely unthreaded from the drain shoe below.