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. Keris is also a symbol of power and of ethnic pride[citation needed] in most communities in Maritime Southeast Asia and Southern Thailand. Kris is also one of the weapons commonly used in Pencak Silat martial art, which is also native to the region.

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. As a result, in 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, Malays, Sundanese, Madurese, Banjar, Bugis, and Makassar. Today, kris is considered as a cultural masterpiece of Indonesia.

A kris can be divided into three parts: blade (bilah or wilah), hilt (hulu), and sheath (warangka). These parts of the kris are objects of art, often carved in meticulous detail and made from various materials: metal, precious or rare types of wood, or gold or ivory. A kris's aesthetic value covers the dhapur (the form and design of the blade, with around 60 variants), the pamor (the pattern of metal alloy decoration on the blade, with around 250 variants), and tangguh referring to the age and origin of a kris.

https://en.wikipedia.org/wiki/Kris