Ningbo Yi Yi Precision Technology Co., Ltd. is a professional non-standard high precision hardware parts manufacturer, our main products includes high precision swiss turned parts/CNC, hexagonal pillar screws, pogopin linker (pogo pin connector),standard/non-standard fasteners, stainless steel screws, stamping, cold heading bolts/cold heading nuts,stainless steel crank shaft, die casting/casting parts, lock accessories/cylinder.