[ Easy Foldable Design ]: The retractable design can make the stool easy to open and close ,and you can adjust the height within the range of 2.36 to 18.5 inches. [ Easy to Carry ]: The Diameter and height of this stool in the closed state are 21 cm and 6 cm") ,each weight is 0.78Kg . This stool also has a wrist strap and a shoulder strap which makes you easily to carry it to anywhere you want to go. [ Safety ]: The safety locking system and Bottom anti-skid design makes the stool more stability and safety, the maximum weight capacity reaches 350 lbs. [ Widely application ]: You can use it indoors and outdoors,such as subway,queuing,camping,fishing etc. [ HOW TO USE IT ]: On each end, there are a pair of holes. Place your fingers into each, rotating it as you pull them apart, make sure all the claps click into the place properly. It can be adjusted to various heights. If you want to fold it ,pull from both ends,rotating the small cover clockwise( use a little bit force), make sure all the claps out of the lock, press it from both ends then turn the small cover at the bottom clockwise.