Punching head: This punching die punching head is made of high-speed steel SKH51, with high hardness, wear resistance and long service life. It is a must-have punching head for the production of air conditioning pipe fittings in the air conditioning condenser evaporator industry. It is especially suitable for the efficient and rapid production of air conditioning flute fittings and copper aluminum or stainless steel pipe air conditioning bypass fittings. It can be adapted to the fully automatic CNC punching machines (All In One) of many manufacturers such as OMS and JDM. Punch specifications can be customized.