3/16″ Vallorbe Chainsaw File. Dozen Pack (12). The Superior File For Sharpening Saw Chain Is The Swiss-Made, Double-Cut File From Vallorbe. The Precise Double-Cut Tooth Angle On A Vallorbe File Helps Deliver A Smooth, Aggressive Sharpening Action That Resists Clogging. Take A Closer Look At It And You Can See That Vallorbe Files Are Superior In Many Ways: Material Quality, Tooth Design (No Overlapping Corners), Tooth Shape And Uniformity, And Absence Of Manufacturing Debris.