Coil-shaped Senko is divided into those developed for the purpose of enjoying aroma and those developed for meeting practical need for extending burning time, such as mosquito repellent Senko (=>Kayariki [mosquito repellent Senko holder]).
これは香りを楽しむものと蚊取り線香（→蚊遣器）のような実利的な燃焼時間延長のためのものが見られる。