Even if you damage the thread of the tool rendering it mostly useless, part of that tool is useful to keep for bashing the BB axle against: make a hole in a plank of wood the same size as the widest end of the tool, bash it into the hole and stand it vertically on the floor, situate the BB axle on the thinner end, and hammer the (horizontal) bike frame until the stuck/bonded by corrosion BB comes out - "Hammer against a butt", was great tip from my zillion year old local bike shop Yoda. Took ages to hammer the sucker out of my Dahon Helios to install the BBS01B. Avoid hammering too hard, and hammer around and as close as possible to the stuck BB. Mallet would have been safer, but I didn't have one. Safer overall to take it to a bike shop - mine was too busy during the start of the pandemic, couldn't do it because neglected bikes suddenly being put back into service and needing repairs was legion, hence the advice conveyed by telephone.
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