Bendy Rails work when a Sackboy uses the hook hat and presses R1 when jumping onto the wire. The player must consistantly press R1 and can use X to jump from the rail. The player can also let go of R1 in order to drop the Sackperson.
They can also be made in create and are found in the tools bag. There is also a rail editing tool used to bend the wire in case the player makes a mistake.