5 New Pocket Watch Vise Case Holders. Watch Movement Holders. This is a new set of 3 watch movement holders, made for a variety of watch styles. You receive: One 30 mm holder. One 30 mm two-way holder. One 20 mm two-way holder. Plastic Vise. This is a new plastic vise. This is a spring loaded plastic vise holder. It is great for holding watch cases and other tools. It measures approximately 1 1/8" x 3 5/16" x 1 1/2" (29 x 83 x 37 mm). Metal Vise Clamp. This is a new metal vise clamp. This is a black, dual screw metal vise. It is great for holding watch cases, work materials and tools. It measures approximately 1 3/4" (44 mm).