20pcs of custom Fisher Tackle Company Trolling Fly heads.  Collared are about .85inches long...see comparison pic...blue collared to standard octopus head. 

Clear UV Reactive Frost...Other options available directly from Fisher Tackle Company

Collared: Has a small collar to keep skirt mat'l from slipping off.  Great for using bands, zip-ties, o-rings or any type of thread.  Has REGULAR diameter hole...will NOT slip over knots.

BigHole:  Has straight shaft with no collar.  Hole is oversized...3mm.  Video shows head slipping over 50lb mono (.70mm) knot.  Makes swapping flies super easy.

Small Collared:  Smaller version of the collared head.  Great for twinkie flys.

BigEye:  Collared with pockets for a 12mm eyes.  

Regular: Standard bullet head...with keeper ribs

5mm Eye: Standard with ribs and 5.5mm eye pockets

Please check out my other unique trolling  lure listings...spoons, flies, etc.

Check out this video for a quick way to make skirts using the Fisher Tackle Heads:

https://youtu.be/UyAkGhsMTR4