Based on this product's specifications, here are some alternatives and similar models
Triangular File MEGA 175 x 8 mm model 69514
Summary description:
Triangular hand file MEGA model 69514 with working dimensions 175 x 8 mm. Designed for shaping, deburring and finishing internal angles and grooves in metal, wood and plastic. Triangular cross-section provides three cutting faces for filing corners, sharpening saw teeth and fitting tight joints. Suitable for workshop, repair and hobby use.