The tipped part of ZC-TOOL brand TCT plane knife adopts high hardness (HRC90) and fine particles of alloy. Being kept using industry-leading welding technology as seamless, without overflowing, relieving of internal stress, and international grinding ways, in comparison of traditional ways, zc-tool plane knife performs much better. They are good working for a variety of hard wood. With the features of good red hardness, edge straightness error <0.05mm, strong resistance to abrasion, sharp blade, smooth planed surface, solid inlay, no distortion and no crack, the sharpening times can be decreased least.