Edge Hardness: HRC55, quenching by the high frequency coil.
Function Detail: this knob cutter, have a round concave edge, use to cutting the bonsai tree burl and root burl, would making a circular concave incision. in the healing process, tree's sap would cover this incision and let it healing quickly and excellent smooth.
Cutting Function: Cut wet branches less than 5 mm in diameter.
