The Mr. Hobby GT65 Mr. Line Chisel (0.3mm Blade Included) is a precision cutting tool designed for easily creating thin, uniform grooves with a convex cutting edge. It is suitable for use on vehicles, aircraft, and ship decks. The blade is detachable and can be replaced with one of a different size that is sold separately. The package includes a general-purpose 0.3mm blade. To use, attach the cutting edge to the flat surface of the grip, place the blade at a right angle against the area to be carved, and pull towards you. Adjust the depth of the groove by controlling the force applied to the blade. The recommended angle between the surface and grip is 45-60 degrees when viewed from the side. Perfect for professional and precise line chiseling.