KIK Series - Shackleless KIK Interchangeable Core PACLOCK’s patented KIK padlocks are designed to work with KIK cylinders  in a hockey-puck body. KIK-2170 Series hockey-pucks are made from hardened steel which is then nickel plated for added durability and to protect against rust.  The steel locks are heat treated and nickel plated in the USA.  Your support of PACLOCK supports a variety of American businesses.