MADE IN USA. Self-centering diode press for 3.8mm diodes is made from carbon steel for long lifetime usage. Comes with a brass sleeve that screws onto the threaded portion of AixiZ-style diode modules. The press is drilled with a hole all the way through so that any leads soldered onto the diode won't have to be removed.
Click here for a tutorial on how to use the diode press.