The kris or keris in Indonesian languages, is an Indonesian asymmetrical dagger with distinctive blade-patterning achieved through alternating laminations of iron and nickelous iron ("pamor"). The kris is famous for its distinctive wavy blade, although many have straight blades as well, and is one of the weapons commonly used in then "pencak silat" martial art native the Indonesia. Kris have been produced in many regions of Indonesia for centuries, but nowhere—although the island of Bali comes close—is the kris so embedded in a mutually-connected whole of ritual prescriptions and acts, ceremonies, mythical backgrounds and epic poetry as in Central Java. Within Indonesia the kris is commonly associated with Javanese culture, although other ethnicities are familiar with the weapon as part of their culture, such as the Balinese, Sundanese, Malay, Madurese, Banjar, Buginese, and Makassar people. Abroad, the kris is considered as a cultural symbol of Indonesia.