It depends on what type of press is being used. Most Howard or Kwik print presses use magnesium mounted dies, and Kluge or Radio Frequency presses use unmounted dies. For all leather debossing, it is best to use 1/4″ or 3/8″ magnesium.
If you don’t find the answer to your specific question here, please do not hesitate to contact our Customer Service Specialists at OWOSSO by phone at 1-800-444-5552 or by email.