Koyo Bonsai Concave Cutters

Standard shears make a flat cut, which can leave a protruding nub as the tree heals. These concave cutters are engineered with a rounded blade that removes a small section of wood around the branch base, creating a slight indentation that allows the bark to grow over the wound flush with the trunk for a cleaner, less visible scar.

While these are professional-grade tools, they are excellent for any enthusiast serious about bonsai development. The high-quality Japanese steel and leverage make them easier to use and more forgiving than cheaper alternatives, helping you achieve better results as you learn.

At 10.75 inches long, these cutters provide significant leverage, making them ideal for branches up to about half an inch in diameter. For anything thicker, you should use a branch splitter or saw to avoid damaging the tool or the tree.

To keep the edge sharp and prevent rust, wipe the blades clean with a soft cloth after every use. It is also good practice to occasionally apply a light coat of camellia oil to the blades before storing them in a dry place.

These are specifically designed for the delicate, precise work required in bonsai cultivation. While they will cut other plants, they are not intended for heavy-duty garden pruning and may be damaged if used on woody, fibrous stems outside of bonsai applications.