This is a spool that fits in a carabiner. It's used for securing paracords or other cords. 03 Sept 2013 update: Added a V2 version. Allows the use of either M3 screw/nut or cableties to secure the 2 halves together. Also tweaked the design so that the spooling of the cords will be more even near the ends. Cheers!Print 2 sets of the Carabiner_Spool_62v2.stl Insert the 2 halves of the spool into the carabiner before securing the 2 halves with the M3 nuts and M3x10 screws or Cableties. This is the Carabiner I used (the description is Aluminium but the main body is Stainless steel): http://www.aliexpress.com/item/L11-Top-Aluminum-Oval-Main-Lock-Heavy-Duty-Carabiner-4-1-2-With-Locking-Pro/877901916.html Inspired by http://stormdrane.blogspot.it/2011/08/paracord-carabiner-spool.html