This tool has been specifically developed to safely open Longines Ultronic watches. These fit a 12-sided caseback measuring 30.0mm across flats.
It has been developed to match generic Rolex/Bergeon style case openers and will fit Rolex adapters for the 5700 universal case opening tool. It can also be used with a 6.00mm diameter rod. For tighter backs it is recommended to use a 5700 tool or 2-handle case tool to ensure enough downward pressure can be used when unscrewing the back.
The case opener is custom 3D printed to ensure a good fit and is printed from durable plastic which will open tight case backs while eliminating the risk of scratching associated with generic metal tools. The handle is printed in black and the die is printed in iron grey.
Due to the 3D printed nature of these parts, there will be visible layers as shown in the pictures. If you are in any way unsatisfied with this product please do not hesitate contact us.
If you have any questions don't hesitate to get in touch.