Concave cutters are one of the three essential tools. They make cuts that are too big for your Ashinaga shears and allow you to reach into the tree to execute a straight, even cut. These are "straight" concave cutters that will not create a "hollow"
Ryuga tools are made in China- originally for the Japanese Market. They are a high-quality tool without the premium paid for Japanese tools. I use these tools myself and I'm very happy with them.
