The New Arbortech Diamond File is the perfect tool for sharpening the Arbortech Turbo Plane blade or any of the round carbide teeth that are included with Mini Carver, Mini Turbo, Industrial Pro, and Turbo Shaft tools. This diamond file would also be a great tool for sharpening other carving tools when more than a strop is needed. The Arbortech Diamond File is dual sided with 400 grit on both sides. The size of the diamond surface is 3/4" x 1 7/8" with an overall length of about 6".