Very handy, easily adjusts

Very handy, is very easily adjusted to the different diameters of watches by simply rotating wheel, and through the various tabs in the form of covers, from damaging the watch cover with an unsuitable tool. Already used three times after buying the suitable batteries from Amazon.com obviously saves money because 4 or 5 times cheaper than changing a battery to the jeweler, in clear I already amortized, so I very satisfied with my purchase.