Watch Battery Back Case Opening Fixer Repair Tool

Watch Back Case Opener Fixer Repair Tool Kit Battery Screw Cover Remover 1. Universal wrench for watch back case opening and closing 2. Key for waterproof watch case, with 4 sets of clamps: Round, Flat, Square and Toothed 3. The tool is special movable screw-plug back cover of watch, easy to use, easy to carry. 4. The largest open table 3.70 cm in diameter. 5. Kit Qty: 18pcs 6. Main material: Steel 7. Opens watch backs from 17mm-37mm 8. Fully adjustable via thumb wheel