Feature: ◆ The watch case holder tool will minimize the risk of slipping and scratching. ◆ Convenient Use: Has adjustable tempered pins for easy use on water resistant cases. Its compact size makes it very convenient. ◆ Professional adjustable watch back case opener features premium quality, compact size, adjustable jaw length and durable life time. ◆ From teens to adults, it is so easy to operate. No need paying much to go to the jeweller, you can make the DIY by yourself. Specifications: ●Material: Stainless Steel ●Size : 70mm * 28mm * 11mm (L * W * H) ●Adjustable jaw distance from 10 mm to 50 mm ●Compact size, easy to use ●Works great on 99% waterproof watches (with grooves on the back) How to Use 1. Turn the black knob and make it fit snugly around the watch face plate. 2. Then roll the adjustment wheel of the Watch Back Case Opener to set the bit spacing to fit your watch's back case grooves. 3. Just turn it and your watch back case is open up. Package Included: 1 x Watch Back Case Opener Note: If you have any other questions, please feel free to contact us!