Waterproof Watch Case Opener This is a case opener for waterproof watches. The tips are adjustable from 13mm to 56mm, fitting various watch case sizes. Compact and small size makes it very convenient to carry. Features: Minimizes the risk of slippage and scratches. Water-resistant and doesn't easily rust or damage. Tips adjustable from 10mm to 50mm to fit various watch case sizes. Compact and small size, making it very convenient to carry. Perfect for opening waterproof watch cases, battery changes, and watch repairs. Specifications: Material: Stainless Steel or ABS Type Optional: 2 types optional Item Weight: 45g or 1.59ounces Package Weight: 80g or 2.82ounces Item Size: 70 x 40 x15mm or 2.76 x 1.18 x 0.59in Package Size: 80 x 50 x 20mm or 3.15 x 1.97 x .79in How to Use: Twist the black button and ensure a tight fit around the watch face. Then, roll the adjustment wheel on the watch back case opener to adjust the bit distance to fit your watch's back case grooves. Simply twist, and your watch's back case will open. Package List: 1 x Watch Back Case Opener