metal key chain with color injection, perfect as promotion gift, metal key chain with color injection, perfect as promotion gift,we are professional OEM supplier,Disney,Coca cola source from us key chain 1. Material: plastic 2. Size:60*30mm(custom size available) 3. product process: 1)mold making, to make your design on the mold surface, 2) injection, material injected into the mold 3) ...