New Watch Case Opener Fits Rolex Watches. This is a new watch case opene designed for all Rolex water resistant screwback oyster cases. Accurately interlocks with the knurled edges of genuine Rolex case backs. It will not slip or damage case backs. This adjustable case holder accommodates all case sizes. This sturdy frame fits any bench vise. Includes centering pin which allows use in conjunction with the L-G "Master Case Opener" to open screw-on backs. It measures approximately 7 1/4" x 3" (184 x 76 mm). You receive: One die measuring approximately 18.5 mm in diameter. One die measuring approximately 20.5 mm in diameter. One die measuring approximately 22.5 mm in diameter. One die measuring approximately 26.5 mm in diameter. One die measuring approximately 28.5 mm in diameter. One die measuring approximately 29.5 mm in diameter.