The krap koo is made from two pieces of split bamboo, approximately 40cm in length.
The krap puang is made from thin wood or brass, often consisting of a number of pieces tied with string. It is used in royal ceremonies.
The krap saepa is made from wood, like the ranat ek. It has a length of about 20cm and a thickness of about 5cm. The krap saepa is rectangular in shape, and is used in pairs.
Originally put on the air by then owner Ken Kuenzie as KSLQ in 1985, the station changed its call letters to KWMO in July 1998 under the new owner Brad Hildebrand. The station changed its call sign once more on July 28, 2014 to the current KRAP.
KRAP transmits from a site in Warren County about 1 mile (1.6km) north of the Missouri River and downtown Washington. KRAP is a sports station featuring the CBS Sports Radio Network. KRAP also broadcasts local and regional sports play-by-play including St. Louis Blues Hockey, Kansas City Chiefs football as well as high school, college, and minor league sports teams.