Jet Tools' 10 in. Triangle Bastard Cut Metal File is manufactured from hardened steel to ensure durability and consistent cutting performance in demanding environments. The three-sided geometry supports accurate filing in confined or angular spaces, while the coarse teeth improve efficiency during initial shaping stages. Commonly used by machinists, mechanics, and tradespeople, this file delivers reliable control for surface correction, edge refinement, and detailed metalwork where access and precision are essential.