This SHORT version of the the adjustable arm of the Sagework Atlas (formerly Barnett Original) guitar support. It includes both moving parts of the arm, the thumbscrew and its washers.
NOTE: The holes where the arm attaches to the magnet are not threaded. The screw will self-tap the hole and create the threads when inserted for the first time.
I originally purchased the standard sized sagework atlas support and although it was great, getting the short sized arm attachment helped to get the neck exactly where I needed it. I'm 5'5 with shorter arms for size comparison to help anyone deciding on which one to purchase. I'm sure the regular size will work for the largest amount of people but if you're a shorter person I recommend going with the short size after experiencing both.
Bought a short arm for my Sagework guitar support to see if the positioning was better. I'm not sure the position is better but it is OK. Like most things, you shouldn't blame the euipment for your problems (In this case, support slipping down my leg). The part was the same high quality as original. Only critique is that new hardware and an allen wrench wasn't included. The original hardware worked and I had the correct allen wrench so there was no real problem