Tool set for opening backs of large watches Diamond and Moissanite testers 2 turn the wheel slowly until

turn the wheel slowly until the glass / back clicks into place

Takes one rechargeable battery (battery and charger included)

Works on any stone

it's so easy to focus and to use

but 36D means '36 dioptre' which is 10X

Tool set for opening backs of large watches Diamond and Moissanite testers 2 turn the wheel slowly untilSummary Opening kit for all sizes of screw back watch from 18mm diameter to 50mm diameter. It solves the problem of how to open larger (in addition to standard size) watch backs; how to open them when they are too stiff to open (with the opener) just by holding in your hands; and you get tweezers, a watchmaker's eyeglass and a good quality spring lug remover too all in a fitted case. case opener for screw back watches case holder box of attachments