X-ACTO X235 Medium Razor Saw Blade. For medium depth cuts. Balsa wood, railroad tracks, tubing, plastic, rubber, and foam. 4 1/2 inches long x 1 inch Deep, 40 teeth per inch, 0.010 inch thick. Fits 3/8 inch Type C, and Type D handles, as well as Excel K5, K6, and K7 Handles.