These Faithfull Engineer's Hand files fitted with a comfortable handle, for professional and frequent DIY use. They are parallel in width, slightly tapered in thickness and have a double cut with safe edge. Second Cut: approx. 36 teeth per 25mm (Medium). Bastard Cut: approx. 26 teeth per 25mm (Coarse). The FAIFIHSC6 Engineers' File has the following specifications: Type: Hand. Cut: Second Cut. Blade Length: 150mm (6in). Blade Width: 16mm (5/8in).