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 FAIFIHB10 hand file has the following specifications:Cut: Bastard. Blade Length: 250mm (10in). Blade Width: 24mm (15/16in).PTDFAIFIHB10