The watch case holder tool with 4 hard adjustable pins will minimize the risk of slipping and scratching It can be set in different positions for different cases with different sizes The perfect professional tool set for watch repairing, note: The appearance of watch back opener has been updated This is a new waterproof watch back case wrench. Simple to and fully adjustable, it have adjustable tempered pins for easy on water resistant cases. compact size makes it very convenient to . Jaw distance is adjustable from 12mm to 57mm It is used for securing watch cases while opening and closing waterproof backs. watches in place, while using a hand wrench to open case back. The tool is used to minimize the risk of slipping and scratching the backs of watches. The tool can also be used as a holder while watch is being worked on. The tool may be mounted on a desk or work bench. Unit will firmly holds cases up 70mm in diameter. Size: 70mm X 28mm X 11mm Watch Holder size: 50*50mm Material: steel ,metal,plastic Color: blue,yellow Package Contents: 1 x Watch Back Case Opener 1 x Watch Holder Only the above package content, other products are not included. Note: Light and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.