1) One presidential term is 4 years. 2) The maximum time one person can serve as President is 10 years - a VP who ascends to the presidency with less than 2 years left in the term is allowed to run for 2 more terms; if there are more than 2 years left, he or she can only run once.
1 Warding files are parallel in thickness, tapered in width, and thin. Like a hand or flat file that comes to a point on the end. Used for flat work and slotting.  Dreadnought (curved teeth) and millenicut (straight teeth) files both have heavily undercut, sharp but coarse teeth.
Pinning refers to the clogging of the file teeth with pins, which are material shavings. These pins cause the file to lose its cutting ability and can scratch the workpiece. A file card, which is a brush with metal bristles, is used to clean the file.