Bergeon Mainspring Winder- Winds Left- 17 mm Drum w/Arbor

A Bergeon mainspring winder is a must-have for watchmakers! This mainspring winder winds to the left, in a counter-clockwise direction. It has a 17 mm drum with arbor. Wind, store, and install any mainspring you need to with this tool.While can wind and install a mainspring by hand, it is far quicker to use a mainspring winder. The mainspring winder does the hard work for you! It guides the spring into the barrel and minimizes risk of damage during installation.