Keith
Reference your question:
What is the name of this finger grip option?

All I know it by is what is said in the catalogue, which is "Finger Grips".

You have to specify if you want them left handed and it was a $20 option in the 2008 catalogue. They are not available on smaller knives. If you want that list let me know.
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Rod Brown
RKS 3846
RKCC CM-123
Whether you think you can or can not, you are right.