I posted a note about clips to hold material. See above posts. It works great for just holding materials just sitting on the bench.
To keep materials like several strands of crystal flash clumped together while I tying them in and dangling off the back of the vise I use a electronic test clip. You can get test clips at Radio Shack, Frys, Micro Center, etc. You can also probably get them at industrial supply stores such as Grabar, also.
The one pictured is one I keep on my fishing vest to hold small flies i am fishing with while I tie them on or while tying new sections of tippet on.
They work well as hackle pliers, also. You may have to use a mini file to file the beryllium copper's edge because they can be quite sharp.
Guys use the mini-test clips to display thier flies in photos and during demonstrations also.
disinfect your wading equipment. wash boat. disinfect livewells / sumps, wash ur dog