PCB Drill Bits Stronger Hardness, Abrasion Resistant, Corrosion Resistant. Standard Process. ... ,,quality assurance,reliable service.Contact information:Yukai Precision Mould Co., Ltd Marketing Dept. Tel : 0769-8779-3530; Fax : 0769-8778-6557 ... Zone,Guancang Village, Zhangmutou Town, Dongguan City, Guangdong Province, China PCB TOOL