H
Houlahound
here is a pic of my Stretch 2 (also an excellent knife) with the same zip tie setup I use on my Police 4 and all of my other FRN Spydercos. It's cheaper and lighter than other available accessories and it is surprisingly effective with minimal effort.
View attachment 1951746
I make a point to keep the head of the zip tie facing whichever side will contact the lip of my pocket when drawing. This helps it hook on the lip more easily. I have seen others on BF loop a washer, nut, or other objects into the zip tie in order to make a larger "wave" feature, but I have never felt the need to do so (plus the zip-ties look junky enough without hanging more stuff off of them).
*Edit to add that I bought a steel wave attachment from 5x5 combat solutions but it kept popping off with minimal use. I switched to the zip ties and have since remained perfectly satisfied.