This may be the BEST upgrade you can do to a Dillon Square Deal B. This Inline Fabrication Roller Handle replaces the factory ball with a Roller Handle similar to what Dillon offers as an upgrade on the 550 and 650 and standard on the 1050. The factory ball is very hard on your hand and has very poor ergonomics. This update installs easily and makes it MUCH easier to seat primers and operate the machine and is WAY more comfortable. Everyone who has bought one loves it!
http://fasttoys.net/ca/Roller-Conver...Square-Deal-B/