Watch Back Case Opener Knife Watchmaker Repair Tool Double Lever Remover Removal tool The blade is fixed and does not fold into the handle Size: about 143 mm X 20 mm X 5 mm / 5.63 X 0.79 X 0.20 inch This case knife is perfect for your battery changing kit or for use in other applications With 2 different levers that allow you to open most pressure case backs and snap off case backs