BERGEON 8008 Rubber Ball to Open and Close case Backs Ø65 mm, black,white, Open

Amazing! Who knew a simple tool that is so cost-efficient for it’s purpose existed? Also, love the 8-ball design! Works great, fits perfectly!

Seems small, but does the trick. Exactly as described and works.

I had trouble opening an air tag to change out the battery. Tried everything I could find on YT and doc google. Finally I found a rubber ball that usually opens watch battery backs. I looked on Az and decided this one which cost a few bucks more but felt it was not a knockoff. Get it! Great price. Quality ball. And you can open any and all air tags, watch backs, etc. would buy again.

I never thought a ball would have so much Tori. Works great for opening watch backs!

I didn’t think this would work but it does

I need to regulate my Tudor Blackbay since it started running slow. I tried other die-type openers but none would grip the teeth on the case back, so I thought I'd try this before going to a watch maker When I ordered this I didn't think it would work removing the case back off of my Tudor but it did! And with little effort. I was amazed. Very easy to use. I highly recommend

Not sure if I am using it improperly, but I couldn’t get it to open a single watch-back of mine.

Great item used to open watch after purchasing a kit that was 10 times this value which couldn’t open this particular watch. This item which is great quality and value and easy to use. It was effortless to open the watch after purchasing this item. Left no scratches on case. Easy to store.

Tiempo atrás cuando lleve al relojero este Casio que muestro con la bola de goma BERGEON 8008 lo rayó de su tapa roscada de Titanio material de especificación aeroespacial que todo relojero sabe que es delicado cuando se usa para acabado, cuando lo abrió el relojero lo rayó, ahora con la bola de goma cero rayones y pude pulir la tapa trasera con todo cuidado para rebajar el rayón que le dejó, es de gran calidad, se adhiere fuerte, recomiendo su compra.

A quality tool.

Kastade pengar!

This is a basic grippy rubber ball designed to remove screw-type watch backs. I don't see how it would be any different from a more expensive model by the original company that makes these (Bergeron). As others have pointed out, this comes only partially inflated and you will need to fully inflate it using a bike pump or equivalent with a needle adapter. This will open many watch backs once properly inflated, but don't expect miracles. A Rolex clone opened no problem, but a genuine Omega Seamaster wouldn't budge and required a watch back wrench. Also make sure your watch isn't a pry-back first, as this has no effect on those!

Good quality, good packaging