The Glawng Khaek

The Glawng Khaek has a long cylindrical body which is made of hardwood and is
58 cm. (23") in length. The heads are of unequal size, the larger being 20 cm. (8")
in diameter called Na rui (literally "loose") and the smaller 18 cm. (7") in diameter
called Na tan ("outer head"). The two heads are made of calfskin or goatskin.
Originally the two heads were tied down with cane or rattan which was split in half
and tied apart, but now owing to the difficulty obtaining good rattan and cane,
leather tongs are usually used.