There are more than 200 pamor (patterns) in the blade of a keris. But there are only two types of keris: the keris with a straight blade and that with a luk (wavy) bade. The luk are always odd in number. A keris also has a tangguh (model). Tangguh Blambangan are normally rough, while Tangguh Mata are smooth. The finest Tangguh is found in Sendangsedayu, the most difficult keris to make.

The basic materials in the making of a Sendangsedayu consist