Here's another model in my line of impact tools for pre and post apocalyptic SD.  These pieces, made from Grade 2 "Commercially Pure" Titanium with T6 Titanium button head screws, are insulated in all the right places with .250" black O-Ring cord stock, which dampens any reverse impact and can be replaced when necessary.  The insert window on this model contains a 1/2" brass ball.
 
Please pay special attention to the dimensions as they are described in the photos to ensure a proper fit for your hand!