... price punchdie-the pierce punches,punch die,pierce die inserts for fin die,-produced by Dalian Guoyu Precision Machinery ... special heat treatment process, -it will give the die significantly extended service life,about 20 million shots, ... and components,locking blocksApplied inautomobile die, precision plastic mould,punch die, air conditioning fin die, semi-conduct encapsulation mouldProcessing ...