Of medium coarseness, the second-cut TEKTON 10 in. Half-Round File is a versatile machinist's file for working with metal, plastic, and wood. The single-cut teeth on the round side put a semi-smooth finish on interior contours and holes. Flip it over to the flat side, and the cross-cut teeth quickly remove more material with each stroke when you're deburring, rough-shaping, and sharpening. A large, contoured poly handle gives you a comfortable, nonslip grip for controlled speed and pressure with every stroke.