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.