Permagrit 74420 Tungsten Carbide Needle File Set

744-20 5 Piece Needle File Set.
Contains Round, Knife, 3 Square, Square and Hand (flat).
Made from Tungsten Carbide brazed to a mild steel base, they are virtually unbreakable.
They will cut plastics, softwoods, hardwoods, ceramics, fibreglass, etc.