BonsaigersBoutique Knob Cutter

A concave cut creates a slight depression in the wood rather than a flat surface. This shape encourages the tree's cambium layer to grow over the wound more effectively, resulting in a flatter, less visible scar as the branch heals.

Yes, this knob cutter is designed for both. The carbon steel construction is durable enough to handle the denser wood of roots, while the precision blades allow for the delicate shaping required on branches.

Carbon steel is prized for its ability to hold a sharp edge, but it is susceptible to rust if left wet. To keep the tool in top condition, wipe it clean and apply a light coat of camellia oil or mineral oil after every use.

The 210mm length is a standard size that offers excellent leverage for thicker branches, but it may feel slightly large for very small shohin or mame bonsai. It is best suited for medium-sized trees where you need a balance of control and cutting power.

Standard shears make a straight, flush cut, which can leave a protruding bump as the tree heals. A knob cutter is specifically engineered to remove the branch and a small amount of surrounding tissue, allowing the bark to heal flush with the trunk.