Joshua Roth Bonsai Knob Cutters are designed for removing trunk knobs. They produce a hollow, circular cut that heals quickly and with a minimum of scarring. These small professional grade knob cutters are smaller than the standard grade at a length of 6.75:” long.
For basic usage and tips on how to care for your bonsai tools please visit this link. Bonsai Tools & How to Care for Them