Step 3 · Use a Drain Key for Removal
The most effective tool for this job is a specialized drain key, also known as a dumbbell wrench or drain remover. Select the end of the wrench that fits snugly into your drain opening. Insert it so the lugs on the tool firmly engage with the crossbars inside the flange. Once seated, place a large adjustable wrench onto the hex-shaped body of the drain key. Alternatively, if your key has a hole, insert the shaft of a large, sturdy screwdriver through it to use as a T-handle. Apply steady, strong, counter-clockwise pressure to break the flange free. Avoid jerky movements which can break the crossbars.