I don't use jigs with collars seeing as how they make the hole in soft plastic larger, contributing to their sliding back. If I must buy a collared jig because of a weight/hook size combo, I crush the collar with pliers, cut around it with wire cutters and then snip the flattened lead off. Here's the process of making what I call - the
Grub Grip:
24g coated wire used for flower arrangements is easy to use.

Cut a small piece and hold it close to the line tie post:

Wrap the wire tightly around once and snip off one side close to the post:


Bend the wire into an L:

I will not go fishing without the wire grip to hold soft plastics no matter the size:


My jigs are sorted by wt. and hook size and placed in slits in a block of packing foam:

I also use the wire to hold bass jig trailers in place.
Once the trailer is on the hook, I wrap the wire around once into a wire loop, make wire L's and push them into the top of the plastic.

The loop allows good trailer action. Unwind the wire and use it again for another trailer.