To be use for hauling up tools. Didn't want to use climbing rope for this purpose because of more wear and tear. Solid braided poly 100 ft. X 1/2 in safe working load 400 lbs called Secured Line by Lehigh Group a subsidiary of Jarden Corp. No info on how to splice on web. Say on package "Work with pulleys" , most likely because the filler core keeps it round. Picture to follow to show rope.