Because I am somewhat uncoordinated in the field, I have always worried about my hammer being lost on an outcrop - or at the bottom of a hill down which I started to fall.  Therefore, I designed and built my first hammer holster.  I soon found deficiencies in its design, and made improvements.  I am currently using the Mark III (there were several Mark II versions); however, it has broken.  To be fair to myself, when it broke, the hammer stayed attached to me; however, the electrical tape which now keeps the pieces together is unsatisfactory and it is time to make another major improvement.  I am designing the Peterson Mark IV Tactical Hammer Holster.  I will show it here in various steps.