New Watch Case Opener Fits Rolex Watches This is a new watch case opener designed for all water resistant screwback Rolex 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