All Gear AGAFS24SP10 Adjustable Friction Saver, 10' related-oregon-522651-arm-return-spring-for-520-120 You can also use them

You can also use them to change the trajectory of the rope or the pulling angle

and a cut-away cuff design

Add a pulley system

For full body harness w/web loop dorsal attachment

may it be an all terrain vehicle

All Gear AGAFS24SP10 Adjustable Friction Saver, 10' related-oregon-522651-arm-return-spring-for-520-120 You can also use themAluminum Adjustable Ring to Ring helps reduce friction on your climbing line. 10 of your choice of 1 2 24 Strand Line Safetylite II or Neolite II, with a large aluminum ring on one end and a tight sewn eye on the other coupled with a 3 8 x 30 Prusik with a small aluminum ring. Any custom length available upon request.