This curved tooth mill file is designed for shaping wood, easing edges and refining joinery. The teeth are milled with a slight arc or curve which allows them to cut aggressively but still leave a surprisingly fine finish. The teeth cut by shearing wood instead of abrading it which produce small shavings and no tearout instead of dust. The safe edges have no teeth so will not damage adjacent areas. This file is the perfect tool to dial in the width of a tenon without damaging the shoulder or to refine a wooden plane bed. The teeth are ground and then hardened so will stay sharp for a very long time.