Product Features This product suits for watches with screw-in type back cover Suitable for watches with back cover case less then 5.5cm Made of quality metal material, durable and tough, long service life Easy to use: Simple to use and fully adjustable Compact size for easy carrying and storage Perfect professional tool for watch repairing Specification: Color: as shown Material: Metal Size: 7*2.8*1.1cm Suitable Max. Watch Back Case: 5.5cm Package Include 1 x Watch Back Case Opener