The Faithful Three Square Second Cut Engineers File -sometimes described as a triangular file- has 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.

Cut: three square second
Blade Length: 150mm (6in)
Blade Width: 13mm (½in)