AMP Lock PDC-02-2KA is a kit of 2x PDC02 keyed alike that comes with 4 keys. The PDC-02 is made of stainless steel and ductile cast iron with e-coat treatment and electrostatic paint to offer a good rust resistance. Its mass of material – 5 pounds heavy - makes it hard to attempt and cut as it also covers the entire latch on trailer door. It is made to protect trailer barn door style (cargo door padlocks). This lock can be keyed alike with all Amplock locks from Ultimate and Standard Plus Series.