I picked up this pocket knife designed for rope working. For me it was missing a thumb stud and pocket clip. I used some common tools, and a couple not so common tools to modify it.

Amazon Affiliate Links.
Camillus Marlin Spike Folding Knife https://amzn.to/3SoMXcL
The Ashley Book of Knots https://amzn.to/3tZulqq
The Morrow Guide to Knots https://amzn.to/3tZ8LlV