Rasp and File

Rasps and files both shape wood by abrasion rather than a single cutting edge, but their tooth patterns differ in a way that matters: a rasp has individual, sharp teeth punched one at a time into the steel, aggressive and fast-cutting but leaving a rough surface behind; a file has continuous rows of teeth cut across the blade, finer and smoother-cutting but slower to remove material. Standard practice is rasp first to remove bulk waste and rough-shape a curve, then file to refine and smooth what the rasp left behind.

Both come in different coarsenesses (a rasp's is called its "cut" -- bastard, second-cut, smooth) and cross-sections (flat, half-round, round) matched to the shape being worked -- a half-round rasp handles both flat and concave curved surfaces without needing to switch tools mid-shape.