1.With the maximum thickness of 1 mm only, the files are suitable for narrow and deep gap processing. Contoured to make difficult-to-reach areas readily accessible.

2.They are tapered in thickness to make possible prefectly falt filing and flexible for bending while still maintaining their hardness.

3. It is useful for putting in all type of filing machines, lapping machines with tool holder. 

Detailed specifications in the picture.