The Ulticlip Slim 3.3 provides great retention and concealment.  It has a dual slotted mounting area that  allows for 1.5″ hole spacing.  The Slim 3.3 is slightly over 1/2″ wide making it ideal for knife sheaths or other narrow applications.
 
We would recommend this Ulticlip for the Marshall, Duty Marshall, Duty Gremlin and Slim Gentleman.  The 3.3 can also be used on the Badger Claw Leather sheaths