Faithfull SVTF0206 Three-Square Second Cut Engineers File 150mm (6in) FAIFITSSC6

Sometimes described as a triangular file.
Three flat sides and is used to file in acute internal angles, clean cut square corners, enlarge and clean up angular holes and sharpen serrated jaws and saw teeth.
Fitted with a comfortable grip, it is ideal for professional and frequent DIY use.
Blade Length: 150mm (6in).
Blade Width: 13mm (1/2in).