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ALL THE PICKS MANUFACTURED IN BIGLEAF TOOLS ARE ALL MADE OF C65# MANGNESE STEEL；AFTER FORGING IN MOLD，ROUGHCASTS SHOULD COME BY A SERIES OF TECHNICS PROCESS：KIBBLING，QUENCHING，CAREFULLY BURNISHING，PAINTING，PLASTIC-SPRAYING，POLISHING AND ASSEMBLING，EACH PROCESS HAS SEVERAL SPECIALIZED PERSONS TO CHECK AND HOLD THE PASS，INSURING ALL THE PRODUCTS CAN ACCORD WITH THE GS STANDARD。