Gyokucho is a popular brand of professional carpentry saws in Japan. They use a method called impulse hardening to increase the durability of the tooth tips.

The cutting edge is heated for 0.003~0.005 seconds by applying an electrical current, instantly hardening the surface of the steel while maintaining the flexibility inside.


As a result, the saw’s wear resistance increases. The hardened saw tooth is much harder than sharpening files so the blade cannot be sharpened and needs to be replaced once it is dull.

Gyokucho #651 Blue-Hard Ryoba (Double-Sided) Saw / 240mm
$36.81 (was 40.90)
Gyokucho #291 Compact Ryoba Saw / 180mm
$28.71 (was 31.90)

Check out Gyokucho Razorsaw