6) If the watch back does not screw off do not force it. (Take the watch to a watch specialist to avoid damaging your watch.) This tool allows you to remove screw-on watch backs on a variety of watches. This will allow you to replace batteries, clean and oil waterproof seals to extend effectiveness of the seals, and repair internal parts. Watch Tool - Water Proof Watch Case Opener for Nearly Any Watch Case 4 sets of clamps, Round, Flat,Square,Toothed Able Tooling makes the best tools for the watch industry since 1901. This watch case opener will open most waterproof watch cases. Includes four sets of different type of chucks, chuks will work on polygonal, slotted, hole, and grooved case back. This tool comes in a cardboard box for easy storage.

Place and adjust three teeth to fit three slots to create a triangle. Make sure that the three teeth are all of equal base length.

It may be necessary to remove the watch strap or band as it may get in the way. (Please view our other watch tools for pin removers.)

Hold the watch in your palm and with your other hand hold the case opener firmly and carefully press it onto the watch case back.

Turn the handle to close in the three pieces and then firmly turn the opener counter clock-wise to open the watch back.

To avoid misshaping the watch back, loosen the case opener before lifting of the back