![Bergeon Reamer Fit KWM 1.78mm (10444274447)](http://perrinwatchparts.com/cdn/shop/products/64.6200-51-600_600x600.jpg?v=1595350562)
Reamer 1.78 mm Bergeon to use KWM bushings is a Bergeon made, Swiss quality replacement reamer which is inserted into the center shaft of the Bergeon bushing tool. Reamers cut into the plates of clocks, creating a hole to accept the appropriate sized KWM bushing. To be used for bushings with an outside diameter of 1.80 mm.