Description:This knob cutter has a round concave edge, which is used to cut bonsai tree and root knot, and will make a circular concave cut. In the healing process, the sap of the tree covered this incision and allowed it to heal quickly and perfectly. Features: Made of high-quality manganese steel alloy, high, high tensile strength and wear resistance. Remove the branches, leaving a small indented cut that with or without a small scar. It creates a spherical cut in a concave concave shape that will cure the least visible scares and thus create a more pleasing aesthetic. Ideal for removing small branches, ledges and knobs by cutting in wood at a concave angle. Ergonomic handles provide a comfortable hold and allow continuous use without fatigue. Specification: Condition: Material: Alloy Manganese Steel Color: Black Total Length: Approx. 210mm / 8.27 inch Cutting Edge: Approx. 20.6mm / 0.81 inch Opening: Approx. 65mm / 2.56 inch Maximum Diameter/Cut: Approx. 10mm / 0.39 inch Package Weight: Approx. 216g Package Included: 1 x Cutter KnobNote:1. Please allow 1-2cm error due to manual measurement and make sure you do not mind before ordering.2. Please understand that colors may contain chromatic aberration as different placement of photos.