The buk used for court music are usually fixed with nails on the rims, while ones used for folk music are usually tied up with leather straps to form the shape. Performers in the court music usually beat their with "bukchae" (북채, a drum stick) on one hand or two hands together, while drummers in the folk music commonly beat their with it on their right hand as hitting the other side of the buk with their bare left hand. A while ago, even "jong" (종, bell) was referred to as ""soebuk"" (쇠북, metal drum) and included in the "buk" category.