For the best designing experience, use this tool on a laptop or desktop.
The ledges are wider than the rings, which creates the points of leverage along the pole. The default configuration is what we've found works best for most people, but you can move them to wherever feels right.
If you want to fit the spaces to your hand size exactly, rings and ledges are each 12mm tall.
If you change your mind after your poles arrive, the rings and ledges slide off and reposition by hand, so no stress!