Description:_x000D_ This knob cutter has a round concave edge, which is used to cut the bonsai tree burl and root burl, and would make a circular concave incision. In the healing process, tree's sap would cover this incision and let it heal quickly and excellently smooth._x000D_ _x000D_ Features:_x000D_ _x000D_ Made of high quality manganese steel alloy, high intensity, strong tenacity and wearability. _x000D_ Remove branches by leaving a small indented cut that heals with little or no scar. _x000D_ Creates a spherical cut in a hollow concave shape that will heal with the least visible scaring and thus create a more pleasing aesthetic. _x000D_ Ideal for removing small branches, protrusions and knobs by cutting into the wood at a concave angle. _x000D_ Ergonomic handles gives you a comfortable hold and allowing continuous use without fatigue. _x000D_ _x000D_ Specification:_x000D_ Condition: 99.99% Brand _x000D_ Material: Manganese steel alloy_x000D_ Color: Black_x000D_ Overall Length: Approx. 210mm / 8.27inch_x000D_ Cutting edge: Approx. 20.6mm / 0.81inch_x000D_ Opening: Approx. 53mm / 2.09inch_x000D_ Maximum Diameter/Cutting: Approx. 10mm / 0.39inch_x000D_ Package Weight: Approx. 216g_x000D_ _x000D_ Package Included:_x000D_ 1 x Knob Cutter_x000D_ _x000D_ Note:_x000D_ 1. Please allow 1-2 cm error due to manual measurement and make sure you do not mind before ordering._x000D_ 2. Please understand that colors may exist chromatic aberration as the different placement of pictures. 1Made of high quality manganese steel alloy, high intensity, strong tenacity and wearability 2Remove branches by leaving a small indented cut that heals with little or no scar 3Creates a spherical cut in a hollow concave shape that will heal with the least visible scaring and thus create a more pleasing aesthetic 4Ideal for removing small branches, protrusions and knobs by cutting into the wood at a concave angle 5Ergonomic handles gives you a comfortable hold and allowing continuous use without fatigue