Our Professional Grade Double Edge Saw (Ryoba Noko Giri) has a blade length of 8¼˝ and an over all length of 21˝; Cross-cut: 20 tpi and Rip: 10 tpi. The master blacksmith forges our Professional Grade Noko Giri from the best quality yasuki high carbon steel carefully milled by hand for correct thickness. Each blade is individually heat treated and hardened to 54-56; on the Rockwell C scale. They are then straightened and tensioned by hand. After the teeth are cut, they are given a special finish sharpening (hon metate). The rattan wrapped handle gives the user a secure grip.