Utilize Plumbing Dumbbell Wrench

What happens here

Select the appropriate end of the 'plumbing dumbbell' wrench that matches the cross-shaped mechanism inside the drain. This tool is designed with different size fittings on each end to accommodate various drain configurations. Insert the correct fitting firmly into the drain's internal cross, ensuring a snug fit for optimal grip.

Goal: If the drain stopper cannot be removed with a screwdriver, use a 'plumbing dumbbell' wrench, a specialized tool designed to fit various internal drain patterns, to engage the stopper's mechanism.