Bonsai Knob Cutters are one of the most essential tools in styling and training Bonsai. They have a thick concave cutting jaw used to remove stumps, jins, branch bases and also thick roots. Bonsai Warehouse has a fantastic range of Knob Cutters available in different Grades of quality Steel, in Black or Silver Finishes. We are proud to be an authorised Stockist of OSUKA Bonsai Knob Cutters that are made from High Quality Japanese Stainless Steel or Japanese Carbon Steel. Our Knob Cutters have oversized pins and nuts that can withstand the toughest demands and super sharp cutting blades that hold their edge longer because of the quality of steel.