New Rolex Deluxe Screw Watch Back Case Opener Tool Set Specification: 100% Brand New OEM and High Quality Great for opening and closing screw back case, especially forRolex oyster model Size:NO.1--18.5mm??? NO.2--22.5mm? NO.3--26.5mm? NO.4--28.3mm? NO.5--29.5mm Compatible with:Bergeon 5537 Package included: 1*Box case 1*Wrench and 6*size of grooved check(rings)