Faithfull FAIFIHB6 Handled Hand Bastard Cut Engineers File 150mm (6in) These Faithfull Engineers 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 FAIFIHB6 Engineers File has the following specifications: Type: Hand. Cut: Bastard. Blade Length: 150mm (6in). Blade Width: 15mm (5/8in).