China 30mm Standard Square Straight Tungsten Carbide Replaceable Cutter Knives Inserts 30mm X 12 X 1.5mm for Woodworking Spiral Helical Planer Head and DIY Wood Lathe, Find details about China Carbide Insert Knives, Carbide Insert Cutter from 30mm Standard Square Straight Tungsten Carbide Replaceable Cutter Knives Inserts 30mm X 12 X 1.5mm for Woodworking Spiral Helical Planer Head and DIY Wood Lathe