Do not clamp, should be coated on the surface of the lubricating oil, to avoid rust or astringent, fulcrum.
Clamp on the market can be divided into:Japanese high-grade pliersProfessional electronic pliersGerman labor pliersVDE high voltage clamp
Clamp is composed of a cutting edge and a clamp handle, electrician general use needle nose pliers material made of 45# steel in steel production, category. Carbon content of 0.45%, toughness, hardness is appropriate.