DIY CraftsOTOOLWORLD Watch Case Open Ball Friction Ball Watch Case Open Ball Battery Change

Works as expected on all of the watches I've tried it on so far, including my superclone, and it's very inexpensive. Yellow color received. If you don't know the technique - you have to squeeze the ball in such a way to force a smallish section out that becomes very firm. Push that hard against the back of the watch and turn. The rubber feels thick, so I am not worried about it popping after lots of usage. Good tack, and works well when you find the sweet spot.

Not gonna lie ..takes a couple of times and a lil trick to get it to work ..but worked great on my breitling

Worked great.

I just left a review for the more expensive Bergeon ball. My main criticism of that ball is that it is more expensive than what it used to be.This ball seems to be a bit thinner of rubber than the Bergeon ball, which makes it more flexible. The benefit is that you can shape it more easily as you squeeze it into the back of the watch case into whatever shape you need. The problem is that the thinness makes it give a little more if you’re trying to twist off a tight case when you need it to stay stiff instead of flexing. If you’ve ever opened a watch with a rubber ball, you’ll know what I’m talking about. It also may not last as long because of the thinness, but I think it will work just fine for most people.It also came with a pump needle, which the Bergeon ball did not! The Bergeon ball was also more flat, and this one was much more full.I’ll try to update my experiences as time goes on if anything changes.

No grip. Useless.

I used this with great affect on an old pocket watch owned by my great-grandfather or my great-great-grandfather that had suffered being in the waters of Katrina. I soaked the watch in a secret formula to help loosen the rust. Then used this tool on the crystal face and it worked!!

Didn’t work for me,but my cat loves w

This thing worked for me. I used it to remove the back of an old Rolex. Remove the strap or bracelet. Hold the watch in one hand and press the ball hard and turn with the other hand.