That lipstick sized zinc/black jobber crank puller is very soft and would probably only work for new bikes, but won't work at all for winter rust welded BBs.

I've destroyed quite a few of these. When clients think they are smart and show up with this stupid tool "hey I got this for you to use", I keep my wouth shut, pretend I don't own one, and use their tool they thoughtfully provided. The client gets further punished when I use my adjustable monkey wrench to turn this and round it out severely. Well, good thing they are inexpensive, no loss.