Glass Pen This new pen with sockets in different shapes is ideal for cleaning watch glasses in the incoming as well as final quality control without touching the watch case. Can also be used for cleaning dials with without leaving any marks. Also very helpful on precious stones. It results a better brilliance of this materials after rubbing than any other cleaning cloths or swabs. Outside of the watchmaker branch, the pen can be used for cleaning the loupes.Characteristics: light, easy handling, quick putting away and easy sockets changing. Supplied with tip N° 7971-A.