Craftool® Steel Blade 3/8" (10 mm) by Tandy Leather International Save Liquid error (product-badge line 42): -Infinity% $6.99 SKU 8011-00 1 2 3 4 5 6 7 8 9 10+ Quantity Quantity Add to cart Always have a spare 3/8" (10 mm) straight blade on hand for your swivel knife. The right size for general carving.