Pocket Watch Crab Case Opener with Jaxa Style Keys

Die sizes: 21, 26 and 29 mm. For opening and closing Baume & Mercier screw-back cases.

Magnetic key inserts saves a lot of time. European quality

Die Sizes (mm): 18.50, 20.20, 22.50, 26.50, 28.30, 29.50. To open oyster style watches. Watch gets locked into position so that it reduces the chances of scratching.

Butterfly Type with Centre Screw. Adjustable metal pin will slide to open many screw-on watch case backs. Popularly used in Bulova watches. Maximum opening: 50mm.