Lincoln Locker

Info from: http://www.offroaders.com/tech/Lincoln-Lockers-Fozzy-Locker.htm

A Lincoln Locker is a homemade spool created by welding the OEM carrier so that the spider gears no longer turn.  This is known as a "Lincoln Locker" by adopting the name of a popular brand of welding equipment made by Lincoln.  This method can vary anywhere from relatively strong to weak and brittle depending on the strength of the carrier being used and the quality of the welds and where the welds are placed.  In many cases welds thought to be strong are not and break under the stress.   Lincoln Lockers merely replace the minimal cost of a mini spool which has the same net results in traction but can be removed later and the spider gears put back in place.