Promotional key chain 1- Process:All processes are available, it's depending on the design 2- Material:Brass,zinc alloy, iron Promotional Key chain1. Process: All processes are available, it's depending on the design 2. Material: Brass, zinc alloy, iron, pewter, steenless iron, cooper, leather, acrylic, plastic, etc. 3. Size: depending on the size of design, more larger or smaller size are also ...