Step 1: Materials.
Step 2: Construction
First aline the knife and in my case PVC pipe
Step 3: Duck Tape
Wrap some duck tape around the pipe and knife. But be sure to make it tight so it will not move around(trust me i failed at my first attempt).
Step 4: Optional
You can also cut a small line where the knife folds if it folds well that's all plz like and leave comments in the comments section. Hope you enjoyed this instructable.