Putty knives generally consist of a blade and a handle. The blade material is mainly carbon steel (45#, 50#), 65MN, and stainless steel. The surface treatment of the blade is commonly divided into ordinary polishing (the steel strip is sanded and polished when leaving the factory), and mirror polishing (a kind of surface treatment of the metal steel strip, the effect is the same as that of the mirror). The handle is divided into a wooden handle, a plastic handle (the plastic handle has a two-color handle, the appearance is beautiful and comfortable), the iron handle, and the all-plastic putty knife, according to the user's habits and uses.