Features: You can freely design according to the installation location and work conditions to create the best system.The running rails do not need to be parallel. (It can be installed according to the building shape.)Curved running rails are also possible (non-linear work can also be performed).The rails use commercially available H (I) steel, so they are very inexpensive and can be easily installed using ceiling beams, etc. (They can also be moved after installation.)Free cranes move lightly and smoothly, and when combined with electric chain blocks, they can be operated simultaneously in three dimensions.