The Amtech 2-sided diamond sharpening file is ideal for sharpening a wide variety of items, such as scissors, knives and garden tools. This diamond file for sharpening has a tapered blade which is flat on one side and half-round on the other side. The diamond file essentially has two grades, which are 240 (curved side) and 400 (flat side). Features a comfortable soft grip to make handling easier, especially when used as a garden tool sharpener. Approximate size of the knife sharpener is 10” (250mm).