i've bought them by mistake without checking the length of it, but used these cables in various setups that include samplers, pedals, synthesizers, etc. to play live electronic music, and due to the length it forces you to keep everything close in a very very good way, and it's very flexible which saves you from cable overload.
the jack designs also allow you to bring the machines closer to each other
however i have not found them very suitable for my studio setups as i would need longer than 60cm. keep that in mind while buying it.