1. 【High-quality material】: Our case opener is made of high-quality metal materials and ABS, with a reasonable structure, which is an effective case opening tool. 2. 【Easy to adjust and use】: the adjustable jaw distance is from 10 mm to 60 mm, suitable for watches of different sizes. The tool is easy to use, simple design, with adjustable diameter thumbscrews. Just turn the adjusting wheel to set the bit spacing to fit the groove of your watch's back case.The case fixing tool with 4 adjustable hard plastic pins minimizes the risk of slipping and scratching. 3. 【Durable service life】: The solid metal material makes the case opener have a long working time. With adjustable hardened pins, it is convenient to use with waterproof housing. It is also waterproof and will not rust or damage easily. 4. 【Compact size】: The size is 7 x 2.5 x 1 cm (length x width x height). The compact size makes it very practical, convenient, easy to carry to any place, and easy to use. 5. 【Scope of application】: a perfect professional watch repair tool, very suitable for operations such as opening the waterproof case, replacing the battery and repairing the watch.